What number can be added to 9 to get result of 0

To solve this problem, we should set up an equation, letting x be the unknown number.

9 + x = 0 

Next, we should subtract 9 from both sides to cancel out the +9 on the left side of the equation and get the variable alone.

x = -9.

Therefore, the number you are looking for is -9.

Bc equals mb that should be your 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.