Question

In triangle ABC, how long is side c if A = 103°, C = 17°, and a = 21?

Answer 1

c=6.30 units

Explanation:

we know that

Applying the law of sines

a/sin(A)=c/sin(C)

Solve for c

c=a*sin(C)/sin(A)

substitute the values

c=21*sin(17°)/sin(103°)=6.30 units