If sec^-1x=cosec^-1y, then cos^(- 1)(...

If `sec^-1x=cosec^-1y`, then `cos^(- 1)(1/x)+cos^(- 1)(1/y)=`

A

(a) `pi`

B

(b) `(pi)/(4)`

C

(c) `(-pi)/(2)`

D

(d) `(pi)/(2)`

Verified by Experts

The correct Answer is:

D

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