Please help soon! 12th grade solving trig equations

[quasar12]

2sin2(theta) + 3sin(theta) = 0

You must solve for theta and then find the degree it is at. Please help soon!

 

[pka]

2sin2(theta) + 3sin(theta) = 0
You must solve for theta and then find the degree it is at. Please help soon!

Is the problem \(\displaystyle 2\sin^2(\theta)\text{ or }2\sin(2\theta)~?\)

 

[quasar12]

It is 2sin(2theta)

 

[pka]

It is 2sin(2theta)

\(\displaystyle 2\sin(2\theta)+3\sin(\theta)=0\)
\(\displaystyle 4\sin(\theta)\cos(\theta)+3\sin(\theta)=0\)
\(\displaystyle \sin(\theta)[4\cos(\theta)+3]=0\)

So \(\displaystyle \sin(\theta)=0\text{ or }[4\cos(\theta)+3]=0\)
Solve those two.

 

[quasar12]

Thank you so much!