Question

Algebra II someone check my answers

Answer 1

@sourwing @satellite73 @jim_thompson5910 @HelpBlahBlahBlah

Answer 2

9 is wrong

Answer 3

It is then A right?

Answer 4

\[(1-\cos(x))(1+\cos(x))=1-\cos^2(x)=\sin^2(x)\]

Answer 5

and
\[\sqrt{\frac{\sin^2(x)}{\cos^2(x)}}=\sqrt{\tan^2(x)}\]

Answer 6

jeez another bad question
\[\sqrt{\tan^2(x)}=|\tan(x)|\]not \(\pm\tan(x)\)
who is writing this stuff?