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Well the problem is The problems is x = 3cos^3(3t) , y=4sin^2(2t) and it wants to know the length of the curve. It seems impossible without dx/dt simplifying down to something small and I figured it should be possible since I can simplify dy/dt
There has to be a way to simplify it with identities. This is from a parametric equation problem. I already solved and simplified the y= equation, I just need this one.
The problems is x = 3cos^3(3t)
I got dx/dt = -27sin(3t)cos^2(3t)
I need to simplify this. I tried a few identities but I can't get it simpler and I know there is someway to do it. Someone please help me! Thanks
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