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Which of the following functions are dec...

Which of the following functions are decreasing on `(0,\ pi//2)` ? (i) `cosx` (ii) `cos2x` (iii) `tanx` (iv) `cos3x`

A

sin 2x

B

tan x

C

cos x

D

cos 3x

Text Solution

Verified by Experts

The correct Answer is:
C
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