Question

PLEASE PLEASE PLEASE HELP!! WILL MEDAL AND FAN!!

Which expression is equivalent to (cos x)(tan(-x))?

-sin x
sin x
-csc x
csc x

Answer 1

@stgzlg could you please help?

Answer 2

\[\cos x=\cos \left( -x \right)\]

Answer 3

\[\tan \left( -x \right)=\frac{ \sin \left( -x \right) }{ \cos \left( -x \right) }\]
\[\sin \left( -x \right)=-\sin x\]