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Assetion (A) : If x= sin(alpha- beta) sin (gamma- delta), y= sin(beta- gamma) sin (alpha- delta) z=sin (gamma- alpha). Sin (beta- delta) then x+y+z=0 Reason (R) : 2 sin A sin B=cos (A-B)+cos (A+B)

Answer»

A is TRUE, R is true and R is correct explanation of A
A is true, R is true and R is not correct explanation of A
A is true, R is FALSE
A is false, R is true

Answer :C


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