- #1
whyorwhynot
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Homework Statement
Write this expression in factored for as an algebraic expression of a single trig function (e.g., (2 sin x+3)(sin x-1):
sin x - cos2x - 1
Homework Equations
cos2x + sin2x = 1
The Attempt at a Solution
1) cos2x + sin2x = 1
2) sin2x = 1-cos2x
3) -cos2x = cos2x so sin2x = -cos2x+1
But the problem calls for -cos2x-1. Would the resulting function be sin2x - (-sin2x)?
4) sin x (sin x + sin x)
I'm not certain that I did it correctly