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If x!=npi,x!=(2n+1)(pi)/(2),nin then (...

If `x!=npi,x!=(2n+1)(pi)/(2),nin` then
`(sin^(-1)(cosx)+cos^(-1)(sinx))/(tan^(-1)(cotx)+cot^(-1)(tanx))`

A

`(pi)/(6)`

B

`(pi)/(2)`

C

`(pi)/(3)`

D

`(pi)/(4)`

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