Use the sine function if you know the length of the opposite side and the hypotenuse. Plug your values into the equation: sine (x) = opposite ÷ hypotenuse. Say that the length of the opposite side is 6 and the length of the hypotenuse is 10. Divide 6 by 10, which is equal to 0.6. Now you know that sine (x) = 0.6 which is the same as x = sine^-1 (0.6).
Steps:
sin (x) = 6/10
sin(x) = 0.6
then we do sin^-1(0.6), which equals 36.869897645844 ° (degrees)
36.869897645844 ° (degrees) rounded to the nearest tenth is 36.9
