Trigonometry
Find the exact value of tan(x+y)\tan\left(x+y\right)tan(x+y). Use a trigonometric identity.
cosx=−112113\cos x=-\frac{112}{113}cosx=−113112, siny=8485\sin y=\frac{84}{85}siny=8584, xxx in quadrant II and yyy in quadrant I
9928\frac{99}{28}2899
82732716\frac{8273}{2716}27168273
−9928-\frac{99}{28}−2899
92132716\frac{9213}{2716}27169213