Large half angles are of the form 360 × 2 n − θ {\displaystyle 360\times 2^{n}-\theta } , with θ ∈ [ 0 , 90 ] {\displaystyle \theta \in [0,90]} and n ∈ { 0 , . . . , 14 } {\displaystyle n\in \{0,...,14\}} . They are all increasing until n ≥ 8 {\displaystyle n\geq 8} , at which point they may either be increasing or decreasing.
![{\displaystyle \theta \in [0,90]}](https://wikimedia.org/api/rest_v1/media/math/render/svg/3a8772e376e7d8ba9cf35707c36f3e4ebdb6ed79)
