Draw the triangle.
sinθ = y/r
cosθ = x/r
tanθ = y/x
In QII,
y = 3
x = -4
r = 5
so,
cosθ = -4/5
tanθ = -3/4
Angle θ lies in the second quadrant, and sin θ = 3/5.
Find cos θ and tan θ.
1 answer
Find cos θ and tan θ.
1 answer