if cos s = 1/2 and s is not in quadrant 1, what is the value of s for the angle with cos s = 1/2?

Question

jdoe0001 · Answer

well... what's the value of an angle whose cosine is 1/2?  including first quadrant

jdoe0001 · Answer

check your Unit Circle :)

keep in mind that, 1/2 is a positive value of cosine
and yes, cosine is positive on the first quadrant
BUT
it's also positive on "another" quadrant
so, use the "reference angle" on that quadrant :)

trackwiz4 · Answer

quadrant 4?

trackwiz4 · Answer

@jdoe0001

jdoe0001 · Answer

yes, forth quarant :), use that reference angle :)

jdoe0001 · Answer

man, so many typos =(
fourth quadrant, yes

trackwiz4 · Answer

It's totally fine! Would the value of s be 2pi?

trackwiz4 · Answer

I'm taking a 5 question quiz online that I must complete today lol @jdoe0001

jdoe0001 · Answer

$2\pi = 0$   so.. hmm and cosine is 0 is not 1/2

trackwiz4 · Answer

When I look at the unit circle I don't really understand it.

jdoe0001 · Answer

ok... what's the angle that has a cosine of 1/2 in the first quadrant?

trackwiz4 · Answer

pi/3?

trackwiz4 · Answer

Oh I see it is 5pi/3 @jdoe0001

jdoe0001 · Answer

yeap :)

trackwiz4 · Answer

Thank you! May you assist me on another one?

trackwiz4 · Answer

@jdoe0001   If tan s = 1 with 0 < s < 2pi and s is in quadrant 1, s = ____