Posted by Paula on Wednesday, August 7, 2013 at 5:19am.
Given that cos θ = 5/13 and θ is in QIV, find the exact value of
a. y
b. sin θ
c. sec θ
d. tan θ

Trig  Reiny, Wednesday, August 7, 2013 at 8:06am
If cosØ = 5/13 and Ø is in IV , then using the standard definition of cos Ø = x/r
we have x=5, r=13, then
5^2 + y^2 = 13^2
y^2 = 144
and in IV ....
a) y = 12
b) sinØ = 12/13
c) secØ = 13/5
d) tanØ = y/x = 12/5
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