If 8 tan A = -15 and 25 sin B=-7 and neither A nor B is in the fourth on DBSIT AB sinA cos B+cos A sin B = -304 425

If 8 tan A = -15 and 25 sin B = -7 and neither A nor B is in the fourth quadrant, then show that sin A cos B + cos A sin B = (-304)/(425) .

sin(A+B)=sinA cos B +cos A sin B

sin(A-B)=sinA cos B-cosA sinB

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