Prove this:cot 75° + cot 15°=4​

Answer:

[tex]tan75 {}^{0} = 2 + \sqrt{3} [/tex]

[tex]tan \: 15 {}^{0} = 2 - \sqrt{3} [/tex]

=> cot 75⁰ + cot 15⁰

= cot(90⁰ - 15⁰) + cot(90⁰ - 75⁰)

= tan 15⁰ + tan 75⁰

=

[tex]2 + \sqrt{3} + 2 - \sqrt{3} = 4[/tex]

(proven)

write some importance of historical past​

What made most European democracies formed after WWI weak and ineffective?

A. Most of the surrounding countries have monarchies
B. Nobody would tell them how to be a democracy
C. There are too many political parties to get anything done
D. People are too tired from the war to care about government

Before Herodotus', how did Greeks explain the past?

Can someone plz help me

What problems where created before the 14 amendment

Would you feather be an Athenian or a spartan

Corrupt governments in this region have taken borrowed money designed to improve the economy and used it for personal gain.


Please select the best answer from the choices provided

T
F

what is Europes population ​

Who is in charge if the President dies?

Which of the following documents is a foundation for the American values of self-government and limited
power?
A. the English Bill of Rights
B. the Mayflower Compact
C. the Virginia Declaration of Rights
D. the Fundamental Orders of Connecticut
Please select the best answer from the choices provided
A
B
С
D

If any one can answer this free 25 points and brainlinest.But fast​

Why did communism appeal to many Chinese during the mid-1900s?

You are living in the US during the time period when the Confederate
States are being readmitted to the Union through specific guidelines set
up by the federal government. 3 new amendments , extending freedom
and rights, are being added to the Constitution. You are living in which
time period?*

Where was BSE first detected in the mid 1980’s?
a.
United States
c.
Ruminitia
b.
British Columbia
d.
Britain


Please select the best answer from the choices provided

A
B
C
D

Why was the Oregon Trail such a popular route to the west?

Read the following sentences from the article.
1. Harris' victory made history
because it shattered some of the
barriers that have kept women
and people of color out of these
positions.
2. During the campaign, Harris
often described her run for vice
president as part of the legacy of
other Black women who came
before her.
3. Her parents later divorced, and
Harris's mother continued to
raise her and her sister.
4. San Francisco, California, Mayor
London Breed considers Harris a
mentor.
Which two sentences taken together provide the
BEST evidence to support the idea that Kamala
Harris' role models include strong women?

Question 9
What did the events of the Leo Frank case and its aftermath indicate about the Deep South in the years following Reconstruction?
A
Many southerners in the region were afraid that communists were living among them.
B
Many southerners in the region resented people they thought represented northern interests.
С
Many southerners in the region trusted African Americans more than they trusted Europeans.
D
Many southemers in the region were tired of the state failing to adequately punish white supremacists.

What new problems where created after the 14 amendment

Because the cerebellum and cerebrum control movement and behavior, researchers began their investigation by studying the diseased cows' brains.


Please select the best answer from the choices provided


T
F

3. Why do you think that the soil is labeled “Europe”?

Which colony was founded by William Penn

Can someone PLEASE answer my last question.

Describe some of the treasures
found in King Tut's tomb. What
material was everything mostly
covered in?

Richard Russell:
- United States Senator from Georgia
- Secured passage of the National School Lunch Program in 1946.
- Led a panel of five senators around the world to report on the condition of American soldiers during World War II

????:
- Served 25 terms in the House of Representatives
- Considered the "father of the two-ocean navy"
- Engineered and maneuvered multiple bills through Congress to expand the navy
Who fits the description?
A) William Hartsfield
B) Jimmy Carter
C) Lester Maddox
D) Carl Vinson

a country where the head of state is the president is called a?

What is stored at the National Archives?

Slavery was defended for many reasons in the 1800s. Which opinion best explains why some citizens of free states might support slavery? (1 point) Group of answer choices
A. Slaves were needed to build railroads and new cities in the west.

B. Escaped slaves should not be protected by the governments of free states.

C. New states should be able to choose whether slavery would be legal or not.

D.Southern agriculture was too important to the U.S. economy to lose slave labor.

What region of the world became the MAIN focus of imperialistic powers during the Age of Imperialism?
O A Africa
O B Asia
O C the Caribbean
OD. the South Pacific

HELPPPPP PLZZZS

How did the slave trade impact both Africa and the Americas

PLEASE HELP ASAP
what is a nymph