What is the answer I need it immediately?

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.

(x) - (y) = (1 + 4i)

(3 + 6i) - (2 + 2i) = (1 + 4i)