Answer: 3.42
Explanation:
10*sin(20) = 3.42
10 is the hypotenuse, and x is the opposite side, using the sine operation requires the side opposite to the angle to be divided by the hypotenuse.
sine(degrees) = side opposite to the angle / hypotenuse
to solve for the missing side, multiply sine(degrees) * hypotenuse
hypotenuse*sine(degrees) = missing side
10*sine(20) = 3.42