just got a question to ask, If sec =2, find the possible values of tan theta? have to prepare for upcoming test in 2 days ==
Another way to look at it: draw a right triangle with hypotenuse of length 2 and and "near side" of length 1 so the angle is $\displaystyle \theta$. Use the Pythagorean theorem to find the length of the "opposite side". $\displaystyle tan(\theta)$ is, of course, "opposite side over near side".