Question

Can someone please explain this?
The answer is D, but I want to know how you get it.

Answer 1

use the law or sins the answer is d

Answer 2

Using the law of sines:

Sin(angle) = Opposite leg / hypotenuse (A to C)

Sin(63 degrees) = 15 ft / A to C

A to C = 15 / sin(63)

A to C = 15 * cosec 63 degrees.

The answer is D