Question

Помогите срочно!!!
CA=117 см,
CB=156 см.
AB=
см
(дроби сокращай)
sin∢B=
cos∢B=

Answer 1

${ab}^{2} = {117}^{2} + {156}^{2} \\ {ab}^{2} = 38025 \\ ab = \sqrt{38025} = 195$

$\sin(b) = \frac{ca}{cb} = \frac{117}{195} = 0.6$

$\cos(b) = \frac{bc}{ab} = \frac{156}{195} = 0.8$