1.a=β+ m*360°
k·360°+θ=n·360°-θ+ m*360°
2θ=360°·(n+m-k)
θ=180°·(n+m-k)
选D
2.α=x+45°+m*360°
β=x-45°+n*360°
α-β=90°+360°(m-n)=90°+180°*2*(m-n)
选D
1.a=β+ m*360°
k·360°+θ=n·360°-θ+ m*360°
2θ=360°·(n+m-k)
θ=180°·(n+m-k)
选D
2.α=x+45°+m*360°
β=x-45°+n*360°
α-β=90°+360°(m-n)=90°+180°*2*(m-n)
选D