90∘<θ≤180∘90^{\circ}<\theta \leq 180^{\circ}90∘<θ≤180∘
0∘≤θ<90∘0^{\circ} \leq \theta<90^{\circ}0∘≤θ<90∘
90∘>θ≤180∘90^{\circ}>\theta \leq 180^{\circ}90∘>θ≤180∘
0∘≥θ<90∘0^{\circ} \geq \theta<90^{\circ}0∘≥θ<90∘
