Hii! i need help with this question im confused on what the answer is to find out

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.

5\16 x 2\5 = 10/80simplify to 1/80