Math, asked by kavya85003, 11 months ago

(iv)
cos A - cos 3A - cos 5A + cos 7A
sin A - sin 3A + sin 5A - sin 7A
- lan 2A.

Answers

Answered by devil7614

1

Cos A - cos3A - cos5A + cos 7A= cos 8A - cos 8A =0 -:ans

Sin A - sin 3A + sin 5A - sin 7A - lan 2A=

Sin 6A - Sin 10A- lan 2A= - Sin 4A- lan 2A.-:ans

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