Triangle XYZ is mapped onto triangle X′Y′Z′ by a dilation with center (-3,-1) and a scale factor of 2. What are the coordinates of triangle X′Y′Z′ when X(-5,1), Y(-2,0), Z(-2,-3).

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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.