Question

Simplify the expression. sin^2 x-1/cos(-x)

Answer 1

\[\sin^2x=?\]

Answer 2

(Sin x)^2 perhaps

Answer 3

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

Answer 4

\[\sin ^{2}x+\cos ^{2}x=1\]
\[\sin ^{2}x=1-\cos ^{2}x\]

Answer 5

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

Answer 6

use identities