Average Error: 0.3 → 0.4
Time: 3.9s
Precision: 64
\[\frac{1 - \tan x \cdot \tan x}{1 + \tan x \cdot \tan x}\]
↓
\[\frac{1 - \tan x \cdot \tan x}{1 + \sqrt[3]{{\left(\tan x\right)}^{6}}}\]
\frac{1 - \tan x \cdot \tan x}{1 + \tan x \cdot \tan x}
↓
\frac{1 - \tan x \cdot \tan x}{1 + \sqrt[3]{{\left(\tan x\right)}^{6}}}
double code(double x) {
	return ((double) (((double) (1.0 - ((double) (((double) tan(x)) * ((double) tan(x)))))) / ((double) (1.0 + ((double) (((double) tan(x)) * ((double) tan(x))))))));
}
↓
double code(double x) {
	return ((double) (((double) (1.0 - ((double) (((double) tan(x)) * ((double) tan(x)))))) / ((double) (1.0 + ((double) cbrt(((double) pow(((double) tan(x)), 6.0))))))));
}

Error

Bits error versus x

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Your Program's Arguments

Results

Enter valid numbers for all inputs

Derivation

  1. Initial program 0.3

    \[\frac{1 - \tan x \cdot \tan x}{1 + \tan x \cdot \tan x}\]
  2. Using strategy rm

  3. Applied add-cbrt-cube0.4

    \[\leadsto \frac{1 - \tan x \cdot \tan x}{1 + \tan x \cdot \color{blue}{\sqrt[3]{\left(\tan x \cdot \tan x\right) \cdot \tan x}}}\]

  4. Applied add-cbrt-cube0.4

    \[\leadsto \frac{1 - \tan x \cdot \tan x}{1 + \color{blue}{\sqrt[3]{\left(\tan x \cdot \tan x\right) \cdot \tan x}} \cdot \sqrt[3]{\left(\tan x \cdot \tan x\right) \cdot \tan x}}\]

  5. Applied cbrt-unprod0.4

    \[\leadsto \frac{1 - \tan x \cdot \tan x}{1 + \color{blue}{\sqrt[3]{\left(\left(\tan x \cdot \tan x\right) \cdot \tan x\right) \cdot \left(\left(\tan x \cdot \tan x\right) \cdot \tan x\right)}}}\]

  6. Simplified0.4

    \[\leadsto \frac{1 - \tan x \cdot \tan x}{1 + \sqrt[3]{\color{blue}{{\left(\tan x\right)}^{6}}}}\]

  7. Final simplification0.4

    \[\leadsto \frac{1 - \tan x \cdot \tan x}{1 + \sqrt[3]{{\left(\tan x\right)}^{6}}}\]

Reproduce

herbie shell --seed 2020121 
(FPCore (x)
  :name "Trigonometry B"
  :precision binary64
  (/ (- 1 (* (tan x) (tan x))) (+ 1 (* (tan x) (tan x)))))