Law of Cosines

Question

Use the law of cosine to solve each triangle 

a=.48 yd, b=.63 yd, c=.75 yd

Answer 1

c² = a² + b² - 2ab cos C

(0.75)² = (0.48)² + (0.63) - (0.48)(0.63) cos C

 

Calculate to determine the value of cosine C.

The other two angles can be done the same way.

You could also use C and the Law of Sines.