Let X and Y be the following sets: X = {0, 1,3}
Y = = {2,4,5}
Which of the following is the set X \Y?

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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.

Add the cents that add the left overs to get the first number