\[\left(-x \cdot \cot B\right) + \frac{1}{\sin B}\]
Test:
VandenBroeck and Keller, Equation (24)
Bits:
128 bits
Bits error versus B
Bits error versus x
Time: 3.8 s
Input Error: 0.2
Output Error: 0.2
Log: ⚲
Profile: 🕒
\((x * \left(-\frac{\cos B}{\sin B}\right) + \left(\frac{1}{\sin B}\right))_*\)
  1. Started with
    \[\left(-x \cdot \cot B\right) + \frac{1}{\sin B}\]
    0.2
  2. Applied simplify to get
    \[\color{red}{\left(-x \cdot \cot B\right) + \frac{1}{\sin B}} \leadsto \color{blue}{(x * \left(-\cot B\right) + \left(\frac{1}{\sin B}\right))_*}\]
    0.2
  3. Using strategy rm
    0.2
  4. Applied cotan-quot to get
    \[(x * \left(-\color{red}{\cot B}\right) + \left(\frac{1}{\sin B}\right))_* \leadsto (x * \left(-\color{blue}{\frac{\cos B}{\sin B}}\right) + \left(\frac{1}{\sin B}\right))_*\]
    0.2
  5. Removed slow pow expressions

Original test:


(lambda ((B default) (x default))
  #:name "VandenBroeck and Keller, Equation (24)"
  (+ (- (* x (cotan B))) (/ 1 (sin B))))