Question

Solve for the side that connects points C and B: B. A 61° 8 30° C using law of cosines I can do it if it had 2 sides and a angle but I can't do it with 2 angles and 1 given side

Answer 1

The answer is 7

STEP 1

Get the angle of B

$\begin{gathered} STEP 2

We make use of sine rule to find Line BC that connects [tex]\begin{gathered} \frac{SinB}{b}=\frac{SinA}{a} \\ \frac{Sin89}{8}=\frac{\sin 61}{BC} \\ BC\text{ X Sin89= Sin61 X 8} \\ BC\text{ =}\frac{0.8746\text{ X 8}}{0.9999} \\ BC=6.9998 \\ BC\text{ is approx}i\text{mately 7 } \end{gathered}$