Math, asked by poemsthoughts77, 9 months ago

If 4 cos²A - 1 = 0; A is equal to

Answers

Answered by omhchauhan2003

2

Answer:

A=60

Step-by-step explanation:

4cos²A-1=0

4cos²A=1

cos²A=1/4

cosA=1/2

So A=60

Answered by itsnikhilkhatana

0

Step-by-step explanation:

cosA+cos2A=1

⟹cosA=1−cos2A

⟹cosA=sin2A

⟹cos2A=sin4A

⟹cos2A+sin2A=sin4A+sin2A=1

SG

Previous Question

Next Question

Similar questions

Math, 4 months ago

At the beginning of spring, Luke planted a small sunflower in his backyard. The sunflower's height in inches, hh, after two weeks, is given by the equation h=8+2wh=8+2w. What could the number 8 represent in the equation? A.The change in the sunflower's height for every one additional week. B.The sunflower's height after one week. C.The sunflower's final height D.The sunflower's height when...

English, 4 months ago

Trace the Victorian literature features in this two writers Tennyson and Browning and compare and contrast their styles.

Math, 4 months ago

the sum of all even numbers from 2to 100...

World Languages, 9 months ago

What is the law relating to the liability of the state for the tortuous acts of its employees. Explain the concept with the help of case laws.

Science, 9 months ago

Who was the first man in space?to flgo chggfto mstrs ...

Biology, 1 year ago

What is irrigation channle...

Math, 1 year ago

express square11 as the sum of consecutive natural numbers...

Math, 1 year ago

evaluate (1/7 +8/-5)+(-3/14+6-35) ...