SOLUTION: Someone please help me with this. Cos^3 x + Cos x* Sin^2 x

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Question 967706: Someone please help me with this. Cos^3 x + Cos x* Sin^2 x
Answer by Theo(13342) About Me  (Show Source):
You can put this solution on YOUR website!
factor out a cos(x) to get:

cos^3(x) + cos(x) * sin^2(x) = cos(x) * (cos^2(x) + sin^2(x))

since cos^2(x) + sin^2(x) = 1, this becomes cos(x) * 1 which becomes cos(x).

the expression can be simplified to cos(x).