$\displaystyle y=cot\sqrt{x} $ $\displaystyle = -csc^2x(x)^\frac{1}{2}-\frac{1}{2}x^\frac{-1}{2} $ corrrecT?
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Originally Posted by jvignacio $\displaystyle y=cot\sqrt{x} $ $\displaystyle = -csc^2{\color{red}x}(x)^\frac{1}{2}{\color{red}-}\frac{1}{2}x^\frac{-1}{2} $ corrrecT? The x in red is not necessary, and the - sign shouldn't be there. You end up multiplying those terms together, not subtracting them! --Chris
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