Find all possible solutions for $\theta$ to the equation $8\sin(\theta)\cos(\theta)-\sin(\theta) = 0$. Solutions with base angle in quadrant I: $\theta =$ + $n$

Solutions with base angle in quadrant IV: $\theta =$ + $n$

Solutions with base angle on x-axis: $\theta =$ + $n$
where $n$ is any integer, and all base angles are between $0$ and $2\pi$. Use radian measure and enter your answers using at least four significant digits.