{sin (90-x) cos [pi+(x-y)]} + {cos (90-...

`{sin (90-x) cos [pi+(x-y)]} + {cos (90-x) sin[pi -(y-x)]}` का मान क्या है ?

A

`- cos y`

B

`-sin y`

C

`cos x`

D

`tan y`

Verified by Experts

The correct Answer is:

A

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