X + 10, if x = -8 answer pls

-8 + 10= 2. That is your answer. Hope this helps!

Then why is the question on here if you know the answer

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.