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What is the value of cos(90 -B)sin (C-A...

What is the value of `cos(90 -B)sin (C-A) + sin(90 + A) cos(B+ C)- sin (90 - C) cos (A + B)`?
`cos(90 -B)sin (C-A) + sin(90 + A) cos(B+ C)- sin (90 - C) cos (A + B)`का मान क्या है?

A

1

B

sin (A + B - C)

C

cos (B + C-A)

D

0

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