Please quickly do number 12 & 13 I'll give brainliest.

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.

Ithink if ur looking for a ratio it would be 12: 3