SOLUTION: If cos � = -4/9 with � in Quadrant II, find sin �.

Question 416378: If cos � = -4/9 with � in Quadrant II, find sin �.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
If cos � = -4/9 with � in Quadrant II, find sin �.
---
Note: x is negative in QII.
-----
cos = x/r = -4/9
Therefore x = -4 and r = 9
----
So, y = sqrt[9^2-4^2] = sqrt[65]
-----
sin = y/r = sqrt(65)/9
============================
cheers,
Stan H.
==========
RELATED QUESTIONS
If cot � = -9/2 with � in Quadrant II, find sin... (answered by stanbon)

If cot � = -9/2 with � in Quadrant II, find sin... (answered by lwsshak3)

If cos theta equals -4/9 with theta in quadrant 2, find sin... (answered by Alan3354,ikleyn)

If cos � = -4/5 for � in Quadrant II, find sin... (answered by stanbon)

If sin α = 4/5 and cos β = -5/13 for α in Quadrant I and β in... (answered by ikleyn,MathTherapy)

find the exact value of cos(a+b) if sin a =4/5 and sin b= -5/13 ( - in 5 only)with a in... (answered by stanbon)

If cot theta = -9/2 with theta in Quadrant II, find sin... (answered by Alan3354)

find cos(s+t) given that sin s=-1/2, with s in quadrant IV, and sin t=1/4 in quadrant... (answered by lwsshak3)

If sin α = 4/5 and cos β = -5/13 for α in Quadrant I and β in... (answered by solver91311)