Last one, use trigonometry to help you solve for y given that one side is 4 and there is an angle of 50 degrees.

y = 6.22

You can solve this in two ways.

1.) Use SOH CAH TOA:

I typically start off by labeling the sides of the triangle with H (hypotenuse), O (opposite), and A (adjacent). Because I need to figure out what y is when given an angle and 4, I will use CAH, or cosine.

2.) Use Law of Sines:

Solve for the last angle inside the triangle first.

Then use the angle you found (40°) in the equation.

(a) the volume of the cone is 20/3 in3

hence, option a is correct.

sine

step-by-step explanation: