SOLUTION: How do I prove that (cos^3(x)+ sin^2(x)cos(x))/(cos(x))=tan(x) is an identity?

SOLUTION: How do I prove that (cos^3(x)+ sin^2(x)cos(x))/(cos(x))=tan(x) is an identity?

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Question 1053027: How do I prove that (cos^3(x)+ sin^2(x)cos(x))/(cos(x))=tan(x) is an identity?
Answer by ikleyn(52792) (Show Source): You can put this solution on YOUR website!
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As the first step, multiply both sides by cos(x).

As the second step, use sin^2(x) + cos^2(x) = 1.

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