Question

which value of theta is tan theta equal to sin theta?
pi, pi/2, pi/4 or pi/6

Answer 1

Since \[
\tan\theta = \frac{\sin\theta}{\cos\theta}
\]You want \(\cos\theta=1\)

Answer 2

still not sure how to go about getting an answer even with that equation

Answer 3

You should know what \(cos\theta\) is equal to at those given angles. If you don't, then you must learn them.

Answer 4

not sure what to do with the equation

Answer 5

what given angles

Answer 6

\[
\pi, \pi/2, \pi/4 \text{ or } \pi/6
\]

Answer 7

ok

Answer 8

this is something that I just must memorize?

Answer 9

http://ibmathematics.tripod.com/sitebuildercontent/sitebuilderpictures/unitcircle.gif

Answer 10

Yes, I would definitely recommend memorizing them... I can derive them for you, but it is not fun.