Question

Which of the following is a solution to tan^2 x − 1 = 0?

45°
120°
240°
330°

Answer 1

if you rearrange
\[\tan^{2}x-1=0\]
to get
\[\tan^{2}x=1\]
square root both sides to get

\[\tan(x)=\pm \sqrt{1}\]

Answer 2

then just use your calculator to get the answer(s)

Answer 3

IHow you make the plus minus sign?

Answer 4

click the blue button saying equation
then type pm

Answer 5

my calculator is saying error

Answer 6

make sure you close the bracket on your calculator

Answer 7

now it doesnt say anything

Answer 8

\[\tan^{-1}(1)\] that is all you have to write on your calculator

Answer 9

thx