Trigonometry
posted by 3nd3r on .
The question was:
"Given that sin theta is 1/2 and theta is in quadrant IV, find the cos and tan of theta."
I found 1/2 for cosine and 1 for theta, but the answer sheet said I was incorrect. I am almost positive I did this correctly... can someone double check for me?

make a triangle, and you will see that
y = 1, x = sqrt(3) and r = 2
so cos(theta) = sqrt(3)/2
tan(theta) = 1/sqrt(3) or  sqrt(3)/3