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Student Support Forum: 'Derivative of (sin(x))^2' topicStudent Support Forum > General > "Derivative of (sin(x))^2"

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Jake
09/22/10 10:49pm

Hello all,

I am getting very strange results when working with trigonometric functions and derivatives. I'm not sure if the problem is with my notation or what. Here are a couple examples:
- derivative of (sin(x))^2 = 2*(sin(x))^2; should be 2*sin(x)*cos(x)
- f[x_]=(sin(x))^2 evaluates to (sin(x^2))^2; it does this even if input f[x_]=(sin(x))(sin(x))

Wolfram|Alpha outputs these correctly so I'm completely baffled.

Thanks for any insights.

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Subject (listing for 'Derivative of (sin(x))^2')
Author Date Posted
Derivative of (sin(x))^2 Jake 09/22/10 10:49pm
Re: Derivative of (sin(x))^2 yehuda ben-s... 09/26/10 02:47am
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