Consider this composite figure.
What is the volume of the cone?
Cone V = Bh
O v = 28.7 cm
4 cm
cm
O v = 5T cm
O v = 112 Tecm
v =1987cm

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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.

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