Question

Find cos x if (sin^(2)x -1)/cos x = -1

Answer 1

\[\frac{ \sin ^2x-1 }{ \cos x }=-1,\frac{ -\left( 1-\sin ^2x \right) }{ \cos x }=-1\]
\[\frac{ -\cos ^2x }{ \cos x }=-1\]
\[\cos x=1\]

Answer 2

okay, thank you

Answer 3

yw

Answer 4

Sorry for the many questions...LOL

Answer 5

no problem.