Question

MEDAL!!!
TAN ___=12
I use the calculator and get -0.6
But these are the choices
A.85.24
B.87.61
C.0.12
D.0.98

Answer 1

if you have a calculator then its

tan(x) = 12 then

\[x = \tan^{-1}(12)\]

Answer 2

http://www.wolframalpha.com/input/?i=arctan%2812%29

Answer 3

A

Answer 4

you can also check each answer choice

example, pick choice D at random

tan(_____) = 12

tan(0.98) = 12 ... fill in the blank with the number for choice D

0.0171 = 12 ... this is false, so choice D is out

Answer 5

make sure you are in degree mode

Answer 6

nice thing about wolfram is it gives answers in degrees and radians so you don't have to worry about your calculator

Answer 7

got it @jim_thompson5910 @satellite73