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slaaibak
 2 years ago
Best ResponseYou've already chosen the best response.0Let's first write it out: \[{1 \over \cos x} \times {1 \over \sin x } {\sin x \over \cos x} = {1  \sin^2 \over \cos x \times \sin x} = {\cos ^2x \over \cos x \times \sin x} ={ \cos x \over \sin x} = \cot x\]
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