Answer: Below
Explanation:
Immediately we can tell that the image is referring to sin, cos, and tan. Let's use the angle 30.
Sin is Opposite from the angle over Hypotenuse, which is where soh in "soh cah toa" comes from.
sin(30) = 5/x
x* sin(30) = 5
5/sin(30) = x
x = 10
Our answer is 10