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Mathematics 7 Online
OpenStudy (juan1857):

Help/Ayuda Solve each equation for 0

Directrix (directrix):

The double angle formula for sin(2x) is the following: sin(2x) = 2sin(x)cos(x)

Directrix (directrix):

sin2x=-sinx 2sin(x)cos(x) = - sin x 2sin(x)cos(x) + sin x = 0 Factor out sin(x) sin(x) * [ 2* cos x + 1] = 0

Directrix (directrix):

Use the Zero Product Property sin(x) = 0 OR [ 2* cos x + 1] = 0

OpenStudy (juan1857):

ok, thanks

Directrix (directrix):

You still need to find the angles.

Directrix (directrix):

for 0<x<360: @juan1857

OpenStudy (juan1857):

Oh yeah i got them they are 0,120,180, and 240 right?

Directrix (directrix):

At first glance, yes.

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