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zaharov [31]
3 years ago
14

Simplify the expression: cot x sin x - sin quantity pi divided by two minus x. + cos x

Mathematics
1 answer:
podryga [215]3 years ago
3 0
\cot x= \frac{\cos x}{\sin x}  \\ \sin ( \frac{ \pi }{2}-x)=\cos x \\  \\ \cot x \sin x-\sin( \frac{ \pi }{2}-x) +\cos x= \\  \frac{\cos x}{\sin x} \sin x- \cos x+ \cos x= \\ \cos x- \cos x+ \cos x = \\ \cos x  \\  \\ \ \cot x \sin x-\sin( \frac{ \pi }{2}-x) +\cos x=  \cos x
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