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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
4 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.

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