Question

How would you express tan^-1(-1/radical3)

Answer 1

It's 30 degrees...but since it's negative do you just write -30 degrees or make the reference angle from the negative quadrants, like 120 degrees?

Answer 2

@matt101

Answer 3

Either is correct.

However, keep in mind that it's negative in relation to pi or 2pi. So you can say -30 degrees, or 150 degrees (5pi/6), or 330 degrees (11pi/6).

Answer 4

so the only negative answer is if I directly say -30 degrees

Answer 5

Or -210!

Answer 6

got it , ty