ok.. title says it all I feeling really stupid right now and seem to be having trouble with elementary stuff here..(adsbygoogle = window.adsbygoogle || []).push({});

given r= sin 3x

dr= cos 3x * 3

dx

i got that . but next step in the equation i am doing is

3cos 3x * cos x

as i said feeling stupid si it

3 cos^2 3x?

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# Homework Help: Easy trig stuffI jsut feeling dumb

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