If 5sin x =4, then the numberical val...

If `5sin x =4`, then the numberical value of `((tanx-cotx)/(secx-tanx))((cos^(4)x-sin^(4)x)/(2cos^(2)x-1))` ?

A

`(3)/(5)`

B

`(5)/(4)`

C

`(7)/(4)`

D

`(9)/(5)`

Verified by Experts

The correct Answer is:

C

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