Math, asked by goutham66, 11 months ago

√2+√2+2cos2

simplify

Answers

Answered by Anonymous

4

cos8θ=2cos2(4θ)−1 , cos4θ =2cos2(2θ)−1 and cos2θ=2cos2θ−1 ... and 1+ cos2θ=2cos2θ. Hence √2+√2+√2+2cos8θ.

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