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Please help please see photo

Please help please see photo-example-1

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\bf 2sin^2(\theta)+sin(\theta)=0\impliedby \textit{common factor} \\\\\\ sin(\theta)[2sin(\theta)+1]=0\implies \begin{cases} sin(\theta)=0\\\\ \theta=sin^(-1)(0)\\ ---------\\ 2sin(\theta)+1=0\\\\ sin(\theta)=(-1)/(2)\\\\ \theta=sin^(-1)\left( -(1)/(2) \right) \end{cases}

check those angles with those values in your Unit Circle
User Shane Wealti
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