Question 172925
I will answer number (2) only. We would love to see your effort.

2.Find the value of cot 330.

Well, cot330 lies in quadrant 4.

In quadrant 4, cotagent is negative.

Let's find the reference angle of cot330.

To do so, subtract 330 degrees from 360 degrees.

So, 360 - 330 = 30 degrees

Final answer: cot330 = 30 degrees = sqrt{3} but since cotagent is negative in quadrant 4, we must include the negative sign to get the answer -sqrt{3}