Question

HELP, please!

Which expression is equivalent to (sin x + 1)(sin x − 1)?


A.

cos2x




B.
-cos2x




C.
cos2x + 1




D.
cos2x − 1




E.
-cos2x + 1

Answer 1

\[=\sin^2x-1=-\cos^2x\]

Answer 2

thank you can you help with one more please?

Answer 3

yes,welcome.

Answer 4

Simplify the expression: tan(-x)csc(x).

Select one of the options below as your answer:



A.
cos x




B.
-cos x




C.
sin x




D.
sec x




E.
-sec x