Write the measure of the coterminal and reference angle in the second column for the measure of angles given in the first column. Note do not enter the word “degrees” or ° in the answer column.
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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.

Here is my answer, i'm sorry if you didn't understand my explanation

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