θ=(4n+1)π8\theta=\frac{(4 n+1) \pi}{8}θ=8(4n+1)π
θ=(4n+1)π4\theta=(4 n+1) \frac{\pi}{4}θ=(4n+1)4π
θ=(4n+1)π2\theta=(4 n+1) \frac{\pi}{2}θ=(4n+1)2π
θ=(4n+1)π6\theta=(4 n+1) \frac{\pi}{6}θ=(4n+1)6π