You throw a baseball in the air with a starting velocity of 20 feet per second. The baseball is Sfeet high when it leaves your hand, Arter how many seconds will it hit the ground?

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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.