An artist creates a cone shape sculpture for an Art exhibit if the sculpture is 7 feet tall and has a base with a circumference of 21.980 feet what is the volume of the sculpture?

Hello! i hope this
since the cosine is the ratio of the adjacent side to the hypotenuse, you can see that cos 60° = ½. answer. according to the property of cofunctions (topic 3), sin 30° is equal to cos 60°. sin 30° = ½.