sin[2tan^(-1)(5/8)]...

`sin[2tan^(-1)(5/8)]`

A

`25/64`

B

`80/89`

C

`75/128`

D

none of these

Verified by Experts

The correct Answer is:

B

Use `2tan^(-1)x=siin^(-1)(2x)/(1+x^(2))`

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