- #1

- 158

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## Homework Statement

f(x) = sinxcosx

## Homework Equations

Product Rule: f(x)g(x) = f(x)Dg(x) + g(x)Df(x)

## The Attempt at a Solution

I got to sinx(-sinx) + cosxcosx

The answer is supposed to be 0

Would the next step be turning it into -(sinx)

^{2}+ (cosx)

^{2}?