r(t) = cos^3 t + sin^3 t How do you find r'(t)? Would it be -3sin^2 t + 3 cos^2 t or something else?
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Originally Posted by tdat1979 r(t) = cos^3 t + sin^3 t How do you find r'(t)? Would it be -3sin^2 t + 3 cos^2 t or something else? You need to use the chain rule. . Therefore .
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