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SinA=-4/5 and cosB=7/25 and if none of A,B is in 4th quadrant then find the values of sin(A-B)
Dear Sudhir sin A = -4/5cos A = 3/5 Cos B = 7/25HenceSinB = - 24/25 NowSin(A -B) = sin A * cos B - cos A sinB Put the value and get the answer. RegardsArun (askIITians forum expert)
We have sin A =-4/5cos B = 7/25 Then, sin B = 24/25cos A = -3/5Now, sin (A-B) = sin A cos B - cos A sin B = -4/5*7/25 + 3/5*24/25 =72/125-28/125 =44/125
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