!!¡¡Geometry. Cosines/Sines.Include explanation and clear answer.

asked Feb 21, 2019 182k views

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By the law of cosines,

$16^2=8^2+17^2-2\cdot8\cdot17\cos C$

$\cos C=(97)/(272)$

$C=\arccos(97)/(272)\approx69.1^\circ$

Silfverstrom answered Feb 26, 2019

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