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Let S= sum(r=1)^(5) cos (2r-1) (pi)/(11)...

Let `S= sum_(r=1)^(5) cos (2r-1) (pi)/(11)` and `P=Pi_(r=1)^(4) cos (2^(r). (pi)/(15))`, then

A

`log_(s)P=-4`

B

`P=3S`

C

`cosec S gt cosec P`

D

`tan^(-1)P lt tan^(-1)S`

Text Solution

Verified by Experts

The correct Answer is:
D
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ARIHANT MATHS-TRIGONOMETRIC FUNCTIONS AND IDENTITIES-Exercise (Questions Asked In Previous 13 Years Exam)
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  11. If 5 (tan ^(2) x - cos ^(2) x ) = 2 cos 2x +9, then the value of cos 4...

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