find angle b given that c equals 58, a equals 49, and angle a equals 56 using law of sines
+9479 Law of Sines:
\(\frac{\sin A}{a} = \frac{sin B}{b} = \frac{\sin C}{c}\)
Plug in what you know.
\(\frac{\sin56}{49} = \frac{\sin C}{58} \\~\\ \frac{58\sin56}{49} = \sin C \\~\\ \arcsin({\frac{58\sin56}{49}}) = C \\~\\ C \approx 78.905^{\circ}\)
So since we know that there are 180º in every triangle,
180 ≈ 56 + 78.905 + B
B ≈ 180 - 56 - 78.905
B ≈ 45.095º
