How to solve this equation i need ?

If the value of cos330°is√3/2 then find cos 165°.

`if you have a set of parallel lines a and b cut by transversal x, if angle 1 = 167 degrees, what is angle 4 and why. also what is the measure of angle 5 and why? you need to use the names of the angle relationship and explain. ''.

Which point has an coordinates of (2,0) ? a