Adrian makes 10 bracelets and Jennie makes 5 bracelets. They both use the same number of
string colors. How many colors should they use
to make the same amount of money?

Um what? rephrase that ?

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.