Trigonometry
Find the exact value of sin(x+y)\sin\left(x+y\right)sin(x+y). Use a trigonometric identity.
siny=−37\sin y=-\frac37siny=−73, cosx=−29\cos x=-\frac29cosx=−92, xxx in second quadrant, yyy in third quadrant
6−277063\frac{6-2\sqrt{770}}{63}636−2770
211563\frac{2\sqrt{115}}{63}632115
−6−277063-\frac{6-2\sqrt{770}}{63}−636−2770
−211563-\frac{2\sqrt{115}}{63}−632115