Average Error: 15.6 → 0.5
Time: 22.0s
Precision: 64
Internal Precision: 1344
$\frac{1 - \cos x}{1 + \sin x}$
$\frac{\sin x}{\sin x + 1} \cdot \tan \left(\frac{x}{2}\right)$

# Try it out

Results

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# Derivation

1. Initial program 15.6

$\frac{1 - \cos x}{1 + \sin x}$
2. Initial simplification15.6

$\leadsto \frac{1 - \cos x}{1 + \sin x}$
3. Using strategy rm
4. Applied flip--15.8

$\leadsto \frac{\color{blue}{\frac{1 \cdot 1 - \cos x \cdot \cos x}{1 + \cos x}}}{1 + \sin x}$
5. Applied associate-/l/15.8

$\leadsto \color{blue}{\frac{1 \cdot 1 - \cos x \cdot \cos x}{\left(1 + \sin x\right) \cdot \left(1 + \cos x\right)}}$
6. Simplified0.8

$\leadsto \frac{\color{blue}{\sin x \cdot \sin x}}{\left(1 + \sin x\right) \cdot \left(1 + \cos x\right)}$
7. Using strategy rm
8. Applied times-frac0.8

$\leadsto \color{blue}{\frac{\sin x}{1 + \sin x} \cdot \frac{\sin x}{1 + \cos x}}$
9. Simplified0.5

$\leadsto \frac{\sin x}{1 + \sin x} \cdot \color{blue}{\tan \left(\frac{x}{2}\right)}$
10. Final simplification0.5

$\leadsto \frac{\sin x}{\sin x + 1} \cdot \tan \left(\frac{x}{2}\right)$

# Runtime

Time bar (total: 22.0s)Debug log

herbie shell --seed '#(2775764126 3555076145 3898259844 1891440260 2599947619 1948460636)'
(FPCore (x)
:name "(1-cos(x))/(1+sin(x))"
(/ (- 1 (cos x)) (+ 1 (sin x))))