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Q.

In Sin(A-B)CosACosB=

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a

2

b

1

c

0

d

12

answer is A.

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Detailed Solution

A+B+C=1800

sin(A-B)cos A cos B = sin A cos B-cos A sin Bcos A cos B = tan A-tan B =tan A-tan B+tan B-tan C+tan C-tan A =0

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