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The value of sin^(-1)(sin5)+cos^(-1)(cos...

The value of `sin^(-1)(sin5)+cos^(-1)(cos 10)+ tan^(-1)(tan (-6))+cot^(-1)(cot(-10))` is a)`8pi - 21`b)`6pi - 19` c)`9+4pi` d)None of these

A

`8pi - 21`

B

`6pi - 19`

C

`9+4pi`

D

None of these

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A
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