Saturday
August 1, 2015

Homework Help: math

Posted by sh on Sunday, February 15, 2009 at 7:54pm.

solve each equation for 0=/<x=/<2pi

sin^2x + 5sinx + 6 = 0?
how do i factor this and solve?

2sin^2 + sinx = 0
(2sinx - 3)(sinx +2)
sinx = 3/2, -2
how do I solve? These are not part of the special triangles.

2cos^2 - 7cosx + 3 = 0
(2cosx - 1)(cosx - 3)
cosx = 1/2, 3
x= pi/4, 7pi/4,
how do I find solve for 3?

thanks in advance

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