Solve for the specified value of the following right triangle.

Question

If A = 42° and c = 15 ft, find a.

 

13.51 ft

11.15 ft

10.04 ft

12.11 ft

Answer 1

I suppose that the side c is the hypotenuse, so 

sin A = a/15 and

a=c x sin 42= 15 x sin 42

10.04 feet