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What is the value of {sin(90 -x)cos [pi ...

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

A

`-cosy`

B

`-siny`

C

`cosx`

D

tan y

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The correct Answer is:
A
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