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OpenStudy (anonymous):
Show that the derivative of y=(1-cosx)/(sinx) equals the derivative of y=cscx-cotx.
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OpenStudy (anonymous):
\[f(x) = \frac{1-\cos{x}}{\sin{x}}\] \[f'(x) = \frac{\sin{x}\cos{x}-\cos{x}(1-\cos{x})}{\sin^2{x}} = \frac{\cos{x}(\sin{x}+\cos{x}-1)}{\sin^2{x}}\] \[g(x) = \csc{x} - \cot{x} = \frac{1}{\sin{x}} - \frac{\cos{x}}{\sin{x}}\] \[g'(x) = \frac{-\cos{x}}{\sin^2{x}} - \frac{-\sin{x}\cos{x}-\cos{x}\cos{x}}{\sin^2{x}} = \frac{\cos{x}(\sin{x}+\cos{x}-1)}{\sin^2{x}}\]
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