Which of the following is not a decreasing function on the interval \[

1.	Which of the following is not a decreasing function on the interval \[\left( 0,\frac{\pi }{2} \right)\]
A.	\[\cos x\]
B.	\[\cos 2x\]
C.	\[\cos 3x\]
D.	\[\cot x\]
Answer» D. \[\cot x\]

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Which of the following is not a decreasing function on the interval \[\left( 0,\frac{\pi }{2} \right)\]

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