Monday, February 19, 2007

Help with 8.3.49 and 50

Can someone plz explain to me how to do these two?

1 Comments:

Blogger Unknown said...

the solution to 49 is:

(sin x + cos x)^2 - sin 2x =
(2 sin x cos x) + 1 - 2 sin x cos x =
1

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