take a look at the related questions below. In particular,
http://www.jiskha.com/display.cgi?id=1468255540
Multiply; then use fundamental identities to simplify the expression below and determine which of the following is not equivalent.
(sin x + cos x) ^2
a. 1+2sinxcosx
b. sec^2x−tan^2x+2cosxsinx
c. sec x + 2 sin x/sec x
d. sin^2x+cos^2x
e. 1+2cos (pi/2 -x) cosx
3 answers
ah ok, so would it be answer a?
Read the question carefully. It said
which of the following is not equivalent?
Actually, both c & d are not
which of the following is not equivalent?
Actually, both c & d are not
1 answer