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The value of cos ycos((1)/(2)pi-x)-cos((...

The value of `cos ycos((1)/(2)pi-x)-cos((1)/(2)pi-y)cosx+sinycos((1)/(2)pi-x)+cosxsin((1)/(2)pi-y)` is zero is

A

`x=0`

B

`y=0`

C

`x=y+pi//4`

D

`x=3pi//4+y`

Text Solution

Verified by Experts

The correct Answer is:
D
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