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How 1-cosx becomes 2sinx/2 ??

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How 1-cosx becomes 2sinx/2 ??

Posted by Ashutosh Tcg 7 years, 3 months ago

CBSE > Class 12 > Mathematics

3 answers

Saksham Sachdeva 7 years, 3 months ago

Question is wrong Question should be 1-cosx=2sin^2(x/2)

Vaibhav Chaudhary 7 years, 3 months ago

Because cos 2x = 1-2sinx by property. Where angle =x/2 so cos 2x/2=1-2sinx/

Kumar Gaurav 7 years, 3 months ago

1-cosx 1-(1-2sin^2x/2)

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