Guest

Prove That: sinA-sin3A+sin5A-sin7A ------------------------------------- =cot2A cosA-cos3A-cos5A+cos7A

Prove That:
sinA-sin3A+sin5A-sin7A
-------------------------------------   =cot2A
cosA-cos3A-cos5A+cos7A

Grade:11

1 Answers

Vikas TU
14149 Points
5 years ago
Apply sinc – sind formulaes in numerator and cosc – cosd in denmoinator with first (2-2)pair
and U would sort out in the finally to cot2a.

Think You Can Provide A Better Answer ?

Provide a better Answer & Earn Cool Goodies See our forum point policy

ASK QUESTION

Get your questions answered by the expert for free