Math, asked by HarshitSharma123, 8 months ago

why 2cos^2(2x) = 1+ cos(4x)

Answers

Answered by kirat7524

2

Step-by-step explanation:

We know the identity,

cos2x = 2cos²x-1

cos4x = cos2(2x)= 2cos²2x-1

Answered by ItsCrazyDaRk02

3

Answer:

We know the identity,

cos2x = 2cos²x-1

cos4x = cos2(2x)= 2cos²2x-1

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