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If : x=sin(B-C) * cos A, y=sin(C-A) * ...

If : `x=sin(B-C) * cos A, ` `y=sin(C-A) * cos B, ` `z=sin(A-B) * cos C, ` then : x+y+z= (a) sin(A-B-C) (b) cos(A-B-C) (c)0 (d)-1

A

sin (A-B-C)

B

cos (A-B-C)

C

0

D

-1

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The correct Answer is:
C
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