The value of sec(sin^-1(sin((-50pi)/9))+...

The value of `sec(sin^-1(sin((-50pi)/9))+cos^-1(cos((-31pi)/9)))`

A

`sec. (10pi)/9`

B

`sec . pi/9`

C

1

D

`-1`

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The correct Answer is:

B

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