Find the exact value of the trigonometric expression given t

Find the exact value of the trigonometric expression given that sin u = 3/5 and cos v = 24/25 . (Both u and v are in Quadrant III.) cos(u + v)

sin u = - 3/5

cos u = -4/5

cos v = -24/25

sin v = - 7/25

cos ( u+v) = cos u cos v - sin u sin v

plugging the values

cos ( u+v) = (-4/5)(-24/25) - (-3/5)(-7/25) = 96/125 - 21/125 = 75/125 = 3/5

cos (u+v) = 3/5