Question

Using a reference triangle, find the exact value of the expression cos(tan^-1x^2)

Answer 1

tan = opposite/adjacent = x²/1

Answer 2

Find the third side of the triangle then use it to find cos Θ

Answer 3

I got \[\sqrt{x^4?}+1\] ?

Answer 4

I think i found the answer its 1/ the equation from earlier. Thanks alot!!

Answer 5

\[\cos \theta=\frac{ 1 }{\sqrt{x^4+1} }\]