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lf sin(x-y)-cos(x + y) = 1/2 then the v...

lf `sin(x-y)-cos(x + y) = 1/2` then the values of `x & y` lying between `0 and pi` are given by

A

`x=pi//4,y=3pi//4`

B

`x=pi//4,y=3pi//12`

C

`x=5pi//4,y=5pi//12`

D

`x=11pi//12,y=3pi//4`

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