SOLUTION: cos2x=(cos^2)x-(sin^2)x

SOLUTION: cos2x=(cos^2)x-(sin^2)x

Algebra.Com

Question 265625: cos2x=(cos^2)x-(sin^2)x
Answer by roseo(33) (Show Source): You can put this solution on YOUR website!
This is a trig identity (double angle formula) therefore all values of x will work in this equation.
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