Math, asked by raushan7571, 11 months ago

what is the formula of 1+cosx ​

Answers

Answered by harish0365
1

Answer:

1+cosx = 2cos^2(x/2)

Step-by-step explanation:

cos2A= 2cos^2(A) - 1

So, 1+cos2A = 2cos^2(A)

By putting, x in place of 2A, we get,

1+cosx = 2cos^2(x/2)

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