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Let f(x)= cos x sin 2x then choose th...

Let `f(x)= cos x sin 2x ` then choose the best option :

A

`min underset(x in (-pi,pi))(f(x)) gt -7/9`

B

`min underset(x in (-pi,pi))(f(x)) gt -9/7`

C

`min underset(x in (-pi,pi))(f(x)) gt -1/9`

D

`min underset(x in (-pi,pi))(f(x)) gt -2/9`

Text Solution

Verified by Experts

The correct Answer is:
A
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