Trigonometry
Find the exact value of sin(x+y)\sin\left(x+y\right)sin(x+y). Use a trigonometric identity.
cosx=−725\cos x=-\frac{7}{25}cosx=−257, siny=425\sin y=\frac{4}{25}siny=254, xxx and yyy in quadrant II
−24609−28625\frac{-24\sqrt{609}-28}{625}625−24609−28
−24609+28625\frac{-24\sqrt{609}+28}{625}625−24609+28
96−7609625\frac{96-7\sqrt{609}}{625}62596−7609
96+7609625\frac{96+7\sqrt{609}}{625}62596+7609