$\displaystyle y=\sin^2{x}$

Do I use the power rule for 2 sin x

or

the chain rule for 2sin x times cos x

or

the power chain rule for2 sin x times 1?

Thank you!

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- Dec 12th 2007, 04:13 PMTruthbetold[solved] Chain rule or Power rule or both? Trig derivative
$\displaystyle y=\sin^2{x}$

Do I use the power rule for 2 sin x

or

the chain rule for 2sin x times cos x

or

the power chain rule for**2 sin x times 1?**

Thank you! - Dec 12th 2007, 05:15 PMKrizalid
$\displaystyle f'(x)=2\sin x\cdot(\sin x)'.$

Chain rule, that's all. - Dec 13th 2007, 05:14 AMcolby2152