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In any triangle A B C ,\ sin A-cos B=cos...

In any triangle `A B C ,\ sin A-cos B=cos C ,\ ` the angle`\ B` is a.`pi/2` b. `pi/3` c.`pi/4` d. `pi/6`

A

`pi/2`

B

`pi/3`

C

`pi/4`

D

`pi/6`

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