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2"Tan"^(-1)(1)/(5)+"Sec"^(-1)(5 sqrt(2))...

`2"Tan"^(-1)(1)/(5)+"Sec"^(-1)(5 sqrt(2))/(7)+"Tan"^(-1)(1)/(8)=`

A

`(pi)/(6)`

B

`(pi)/(4)`

C

`(pi)/(3)`

D

`(pi)/(8)`

Text Solution

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The correct Answer is:
B
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