Question

Find tan 30.

Answer 1

1/(sqrt(3))

Answer 2

-6.40533119665

Answer 3

tan=sin/cos. You have to memorize the sin and cos for those angles, then just divide sin by cos to get your answer.
assuming that it's a unit circle (hypotenuse equals 1), then tan (30) = sqrt(3)/3 or 1/sqrt3

Answer 4

thank you @alias