Trigonometry
Find the exact value of tan(x+y)\tan\left(x+y\right)tan(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
9108\frac{9\sqrt{10}}{8}8910
2(−4977+24310)533\frac{2\left(-49\sqrt{77}+243\sqrt{10}\right)}{533}5332(−4977+24310)
−9108-\frac{9\sqrt{10}}{8}−8910
−2(−4977+24310)533-\frac{2\left(-49\sqrt{77}+243\sqrt{10}\right)}{533}−5332(−4977+24310)