DONT JOINA ZOOM WITH THE LINK h t t p s : / / z o o m . u s / j / 9 2 4 1 0 3 0 5 0 7 4 ? p w d = N H R z c W w 0 a 0 F T N T J J S 2 o z Q 0 9 4 e F A 4 U T 0 9 MYSTERIOUS MEN IS BACK

The answer is C I will not join do not of the worries :)

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.