Cosθ<0 and tanθ > 0 Determine the quadrant in which the terminal side of θ lies?

1 Answer
Carl S.
Apr 17, 2018

Quadrant 3

Explanation:

if #cos(θ)# is negative the terminal side of #θ# is in either quadrant 2 or 3.

if #tan(θ)# is positive the terminal side of #θ# is in either quadrant 1 or 3. (sin and cos are both positive or sin and cos are both negative)

The only quadrant for which both these conditions are true is quadrant 3.

Related questions
Impact of this question
30725 views around the world
You can reuse this answer
Creative Commons License