Register
Prove that: sin8A/1-cos8A=cot4A​
77.9k views
2 votes
Prove that: sin8A/1-cos8A=cot4A​

User Smkanadl
by
7.8k points

1 Answer

6 votes

Explanation:

Recall the identity


\tan (A)/(2)= (1 - \cos A)/(\sin A)

We can see that


(\sin 8A)/(1 - \cos 8A) = (1)/(\tan 4A)= \cot 4A

User Grumdrig
by
9.5k points
← Prev Question Next Question →

Related questions

User Coffeduong
asked Mar 24, 2017 96.1k views
Prove cosA x cos2A x cos4A x cos8A = sin16A/16sinA
Coffeduong asked Mar 24, 2017
by Coffeduong
7.5k points
1 answer
0 votes
96.1k views
User Srikanth Chekuri
asked Dec 17, 2022 217k views
CosA.cos2A.cos4A=sin8A/8sinA​
Srikanth Chekuri asked Dec 17, 2022
by Srikanth Chekuri
8.1k points
1 answer
5 votes
217k views
User JeanK
asked Sep 16, 2019 214k views
SinA-sin5A+sin9A-sin13A / cosA-Cos5A-Cos9A+cos13A = cot4A
JeanK asked Sep 16, 2019
by JeanK
8.6k points
1 answer
3 votes
214k views
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.5m questions

12.2m answers

Other Questions

How do you can you solve this problem 37 + y = 87; y =
How do you estimate of 4 5/8 X 1/3
A bathtub is being filled with water. After 3 minutes 4/5 of the tub is full. Assuming the rate is constant, how much longer will it take to fill the tub?
i have a field 60m long and 110 wide going to be paved i ordered 660000000cm cubed of cement  how thick must the cement be to cover field
Write words to match the expression. 24- ( 6+3)
Link Copied!