Question

If cos(theta)=-4/5 and theta lies in Quadrant 2, what is the value of tan (theta)

Answer 1

Could you tell me if cos theta= 4/5, then what's tan theta ?
We'll ignore the "-" sign, then we'll come back to it

Answer 2

umm 5/4

Answer 3

How did you get this?

Answer 4

i drew the triangle on the unit circle and marked cos theta and labeled the sides with the numbers and than found tan theta

Answer 5

The third side will be
\[\sqrt{5^2-4^2}=3\]