In △PQR, ∠P = 60º , p = 10 cm and q = 8.7 cm. Solve the triangle.
sinQ/q = sinP/p
Now you know P and Q, and P+Q+R=180
to find side r, use either the law of sines or cosines.
Now you know P and Q, and P+Q+R=180
to find side r, use either the law of sines or cosines.