Math, asked by usasidhal, 11 months ago

cos 4A - cos 4B = 8(cos A-cos B) (cos A +cos B) (cos A-sin B) (cos A+ sin B).

Answers

Answered by muhammadsaleemchacha

2

Step-by-step explanation:

(cosA-sinB)(cosA+sinB)= tanAB

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