Math, asked by palakdhiman05, 10 months ago

Prove these two:-

(a) sin 4A = 4 sinA ( 2 cos^3 A - cos A)

(b) cos 4A = 1 - 8 cos^2A + 8 cos^4 A

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Answered by k26892209

0

Answer:

bi guys have to be in touch soon about the other side

Answered by vatsamugdha300282

0

Answer:

Here it should be helpful .

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