Question

formula of cos square x​

Answer 1

Cos Square x formula

Recall the double angle formula: cos(2x) = cos^2(x) - sin^2(x). We also know the trig identity sin^2(x) + cos^2(x) = 1, so combining these we get the equation cos(2x) = 2cos^2(x) -1. Now we can rearrange this to give: cos^2(x) = (1+cos(2x))/2.

Answer 2

Cos^2x = 1-2sin^2x

Or cos^2x= 1-sin^2xroot