Answer:
[tex]\dfrac{sin(90^{\circ} - \alpha) \times tan (-\alpha) \times cos(\alpha - 180^{\circ})}{cos(100^{\circ}) \times sin(135 ^{\circ})} = \dfrac{\sqrt{2} \times sin(2 \times \alpha) }{2 \times cos(100^{\circ}) }[/tex]
Explanation:
The given expression is presented as follows;
[tex]\dfrac{sin(90^{\circ} - \alpha) \times tan (-\alpha) \times cos(\alpha - 180^{\circ})}{cos(100^{\circ}) \times sin(135 ^{\circ})}[/tex]
The sine, cosine, and tangent of the common angles are given as follows;
sin(A - B) = sin(A)·cos(B) - cos(A)·sin(B)
∴ sin(90° - α) = sin(90°)·cos(α) - cos(90°)·sin(α) = cos(α)
tan(-α) = -tan(α)
cos(A - B) = cos(A)·cos(B) + sin(A)·sin(B)
∴ cos(α - 180°) = cos(α)·cos(180°) + sin(α)·sin(180°) = -cos(α)
sin(135°) = sin(90° + 45°) = sin(90°)·cos(45°) + sin(45°)·cos(90°) = cos(45°) = √2/2
Therefore, we get;
[tex]\dfrac{sin(90^{\circ} - \alpha) \times tan (-\alpha) \times -cos( 180^{\circ})}{cos(100^{\circ}) \times sin(135 ^{\circ})} = \dfrac{cos( \alpha) \times -tan (\alpha) \times -cos(\alpha )}{cos(100^{\circ}) \times \dfrac{\sqrt{2} }{2}}[/tex]
[tex]\dfrac{cos( \alpha) \times -\dfrac{sin(\alpha)}{cos(\alpha)} \times -cos(\alpha )}{cos(100^{\circ}) \times \dfrac{\sqrt{2} }{2}} = \dfrac{sin( \alpha) \times cos(\alpha )}{cos(100^{\circ}) \times \dfrac{\sqrt{2} }{2}} = \dfrac{2}{\sqrt{2} } \times \dfrac{sin( \alpha) \times cos(\alpha )}{cos(100^{\circ}) }[/tex]
[tex]\dfrac{2}{\sqrt{2} } \times \dfrac{sin( \alpha) \times cos(\alpha )}{cos(100^{\circ}) } = \dfrac{sin(2 \times \alpha) }{\sqrt{2} \times cos(100^{\circ}) }[/tex]
Therefore;
[tex]\dfrac{sin(90^{\circ} - \alpha) \times tan (-\alpha) \times cos(\alpha - 180^{\circ})}{cos(100^{\circ}) \times sin(135 ^{\circ})} = \dfrac{\sqrt{2} \times sin(2 \times \alpha) }{2 \times cos(100^{\circ}) }[/tex]
Two use of dovetail saw
Answer:
They are particularly use when it is use for cutting small or very precise cut. They are particularly use in joint making mostly dovetail joints
hope it helps
True or False: Microsoft Publisher allows you to click and drag an element anywhere on the page.
Answer:
True
Explanation:
Use the ________ predefined formats to quickly format cells.
Style Formats
Cell Styles
Cell Definitions
Cell Formats
Answer:
I think choose (2)
Cell styles
how is a trade off best described ?
dilema
compromise
demand
complication
>What is the output of the following code:
list1 = [ 'cyber', 786 , 2.23, 'square', 70.2 ]
print (list1[1] )
Answer:
Given code output is "786".
Explanation:
Code:
list1 = [ 'cyber', 786 , 2.23, 'square', 70.2 ]#defining a list list1 that holds value in parameter
print (list1[1] )#use a print method that prints list index value
In the given code a list "list1" is declared that holds value in it and in the next step a print method is declared that prints the first index value of the list.
If you see rough patches, loose,gravel,or potholes on the road you should
Answer:
move out of the way
Explanation:
can you plz answer me from the photo
What is Adobe Dreamweaver ? What is it used for ? Name and describe its major components and features in detail
Answer:
Part A
Adobe Dreamweaver is a computer application used for building websites and other types of web development, as well as mobile content development for both the intranet and the internet, on the Apple OS X and Windows Operating System Platforms
Part B
Adobe Dreamweaver is used for designing, building, and coding websites and mobile contents by developers and designers and by mobile content developers
Part C
i) Adobe Dreamweaver allows rapid flexible development of websites
The simplified engine on which Adobe Dreamweaver is based makes it easy to adapt web standards including CSS, and HTML for personalized web projects, thereby aiding learning of the web standards and fast (timely) web development
ii) The time between starting development and deployment is shorter when using Adobe Dreamweaver due to the availability of customizable templates that serve wide range of user web interfaces, including e-commerce pages, newsletters, emails and blogs
iii) Building of websites that adapts to the screen size of the device from where the site is accessed is possible with Adobe Dreamweaver
Explanation:
The cultivation in mountain areas, with their scattered plots of usable land at various altitudes with different climates, landscapes and little margin for mechanization, are managed by family farms in the most efficient and effective way.
Answer:
Mountain farming
Explanation:
Mountain farming is done in hilly areas of the mountains. It is mainly family farming. The mountain farming is mainly done in the mountains where the paddy fields are scattered and the limited use of the usable lands are available.
It is cultivated in different types of climatic conditions or landscapes with limited use of mechanization or machines. The mountain farming is maintained by the family farms in an effective way.
how to prevent water pollution
Answer:
Here is your answer
Explanation:
1. pick up litter and throw it away in a garbage can.
2. use environmentally household products such as washing powder, household cleaning agents
3. wash your car or outdoor equipment where it can flow to a gravel or grassed area instead of a street.
4. don't throw waste at ocean it will harm the animals and create tocsin.
who invented the system of logarithm in 1614 AD
Answer:
JOHN NAPIER
Explanation:
The method of logarithms was publicly propounded by John Napier in 1614, in a book entitled Mirifici Logarithmorum Canonis Descriptio (Description of the Wonderful Rule of Logarithms). The book contained fifty-seven pages of explanatory matter and ninety pages of tables related to natural logarithms.
Answer:
Joost Bürgi
Explanation:
He invented it but John Napier worked on it earlier than Bürgi.
Write a structured algorithm that prompts the
user to input two numbers. The algorithm should
multiply both numbers and then prompt the
user to enter the answer. The algorithm should
compare the answer entered with that calculated
and output "correct answer" or "incorrect answer"
accordingly. At the start, input how many sums
will be done.
Answer:
Step 1 : Start
Step2 : Input first number, num1
Step3 : Input second number, num2
Step4 : product - - > num1 * num2 (product of num1 and num2)
Step5 : Input product, myanswer
Step6 : comparison - - - > correct or incorrect based on myanswer and product
Step6: print(comparison)
Step7: End
Explanation:
Algorithm is a sequence of instructions a computer is expected to follow to solve a particular problem.
Required :
Two inputs ; num1 and num2
Expected output
Algorithm :
Step 1 : Start
Step2 : Input first number, num1
Step3 : Input second number, num2
Step4 : product - - > num1 * num2 (product of num1 and num2)
Step5 : Input product, myanswer
Step6 : comparison - - - > correct or incorrect based on myanswer and product
Step6: print(comparison)
Step7: End
The two numbers to multiply are entered ; the product is calculated by the program ; the the user inputs his or her own expecteted product ;
Both are compared and the output of the comparison is displayed (either correct oe incorrect)
How do you reset a g.mail password?
Answer:
put: forgot password to reset it
Answer:
Change your pass word
Open your Go ogle Account. You might need to sign in.
Under "Security," select Signing in to G oo gle.
Choose Password. You might need to sign in again.
Enter your new password, then select Change Password.
A current divider is to be designed using a 2mA DC current source and 1K resistors, the specification that the current is 1.5mA.
Answer:
The solution of the given query is described below throughout the explanation segment.
Explanation:
Given:
DC current,
= 2mA
Resistors,
= 1K
According to the question,
⇒ [tex]i=\frac{(1K+1K+1K)\times 2mA}{1K+1K+1K+1K}[/tex]
⇒ [tex]= \frac{3}{4}\times2mA[/tex]
⇒ [tex]=1.5mA[/tex]
17.35 ma of current is flowing though a brown-red-brown resistor,what is v
Answer:
2.1V
Explanation:
brown-red-brown = 120Ω
V = I·R = 17.35 · 120 = 2.082V
However, the tolerance of the resistor is at least 10%, so you can't express the voltage that accurate.
What is a benefit of using a client/server network?
Cheap to maintain
Easy to install
Has a central, powerful computer
Unable to share files
Answer:
Has a central powerful computer
Explanation:
When operating a client - server network, a certain access mediun is created such that clients can access information, materials and services from a central computer, this poses great advantage in the area of security and control. Clients would be able to gain access from this central computer using either a local or wide area network. The accessibility provided through this powerful, central computer allows the the network to monitor what actions are being performed and make appropriate restrictions on the network, hence, preventing the invasion of malware and viruses. Hence, the central control is a great feature of a client - server network.
sign that your desktop may need cleaning
Answer:
My desktop may need be cleaning but for real!!
write a program to enter RADIUS of a CIRCLE and PRINT AREA of TRIANGLE using Q Basic. (class 8)
Answer:
The program is as follows:
10 INPUT RADIUS, BASE, HEIGHT
20 CIRCLE = 3.142* RADIUS * RADIUS
30 TRIANGLE = 0.5* BASE * HEIGHT
40 PRINT CIRCLE
50 PRINT TRIANGLE
60 STOP
Explanation:
The program description doesn't tally;
In other words, it is impossible to calculate the area of a triangle using the radius of a circle.
So, I designed the program to get input for radius, base and height.
Get input for radius, base and height
10 INPUT RADIUS, BASE, HEIGHT
Calculate area of circle
20 CIRCLE = 3.142* RADIUS * RADIUS
Calculate area of triangle
30 TRIANGLE = 0.5* BASE * HEIGHT
Print area of circle
40 PRINT CIRCLE
Print area of triangle
50 PRINT TRIANGLE
End of program
60 STOP
Which scenario would most benefit from a self-join query?
a. a query connecting customers and products
b. a query connecting supervisors and customers
c. a query connecting employees and their orders
d. a query connecting employees and their supervisors
Answer:
answer is D
Explanation:
Just did it on edge
Tin học đã làm thay đổi công tác văn phòng ngày nay như thế nào?
What is market information?
please answer in your own words since my teacher will probably notice if I plagerize
Answer:
Market information is is the understanding of the trends going on in a market such as demographic popular product age interests things like that
Explanation:
Investigate the many ways that hardware and software can cause an interrupt to occur. Are ALL interrupts treated equally or do some have priority over others?
Answer:
Following are the responses to the given question:
Explanation:
This list is based mostly on the processor. Then you'll be ordered. An interrupt of a particular cable (wire) is produced for PC-ish CPUs (IRQ 0 - 31 for some intel processors). The bigger challenge is a lower number.
Strange factors have included a system clock, power business, 0, some reserved for use by CPU testing, serial/parallel/... ports and also some terminated/error/state/new devices requests device Thus a key touch on the keyboards could create an interrupt that was direct on old devices.
it is used to hold screws, jumpers, fasteners, and other small parts and prevent them from getting mixed together
Answer:
Cable ties
Explanation:
Used to bundle cables neatly inside and outside of a computer. It is used to hold screws, jumpers, fasteners, and other small parts and prevent them from getting mixed together.
>3
[tex]\boxed{Parts\: organizer}[/tex] is used to hold screws, jumpers, fasteners, and other small parts and prevent them from getting mixed together.
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what are the advantages of saving files in a cloud?
Please help!!
I copied my friend's homework... give me some excuses to get out of it!!
Answer:
Tell the teacher that you will pee in her coffee cup if they don't forget about what you did
Explanation:
Answer:
Explanation:
Depends on the homework, but
"We worked together on it and came to similar conclusions."
"We checked answers with each other when we finished to make sure we got the problems correct and did the problems correctly."
What are the uses of DVD Ram
Answer:
Like ordinary random access memory (RAM), it can be repeatedly read, written to, and erased. Intended mostly for removable computer storage, DVD-RAM provides the capabilities of Rewriteable CD (CD-RW) - users can run programs from the discs, copy files to them and rewrite or delete them.
Complete the sentence
A _______ spans a geographic area like a city,is larger than a LAN and smaller than WAN
Answer:
metropolitan area network (MAN)
Explanation:
A local area network (LAN) refers to a group of personal computers (PCs) or terminals that are located within the same general area and connected by a common network cable (communication circuit), so that they can exchange information from one node of the network to another. A local area network (LAN) is typically used in small or limited areas such as a set of rooms, a single building, school, hospital, or a set of well-connected buildings.
On the other hand, a metropolitan area network (MAN) spans a geographic area like a city, is larger than a local area network (LAN) and smaller than wide area network (WAN).
Basically, a metropolitan area network (MAN) is formed by an aggregation of multiple local area network (LAN) that are interconnected using backbone provided by an internet service provider (ISP). A metropolitan area network (MAN) spans for about 5 kilometers to 50 kilometers in size.
what do you mean by professional education? explain with examples.
Answer:
prfesssional education is any programs that improve the knowledge,skills and attitudes.
Example include; educational course and training to become a teacher,nursing course,aeronautics engineering,etc.
Which is an example of a table style option?
O banded columns
O shading
O borders
O pen color
PLEASE HELP ASAP
Which is an example of a table style option?
O banded columns ✅
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pls any one what is pheumatic and hydrautic
Answer:
pheumatic is a branch of engineering that make use of gas
hydraulic is a technology and aplied science using engineering