What is the value of /का मान क्या है? [(...

What is the value of /का मान क्या है? `[(sin 59^@ cos 31^@+ cos 59^@ sin 31^@) div (cos 20^@ cos 25^@- sin 20^@ sin 25^@)]`

A

`1//sqrt2`

B

`2 sqrt2`

C

`sqrt3`

D

`sqrt2`

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