Question

cos(x) = -1/5, pi 13 years ago

Answer 1

calculator exercise
find \(\cos^{-1}(-\frac{1}{5})\) first

Answer 2

then take \(360-\text{answer}\) to put yourself in the right interval
if you are working in degrees
if you are working in radians, then \(2\pi-\text{answer}\)

Answer 3

I need to find tan(x), cot(x), sec(x), csc(x)

Answer 4

My answer for sin(x) = -2 sqrt6/5