\[\sin \left(x + \varepsilon\right) - \sin x\]
Test:
NMSE example 3.3
Bits:
128 bits
Bits error versus x
Bits error versus eps
Time: 26.3 s
Input Error: 37.0
Output Error: 0.5
Log:
Profile: 🕒
\(\begin{cases} \log \left(e^{\sin x \cdot \cos \varepsilon}\right) + \left(\cos x \cdot \sin \varepsilon - \sin x\right) & \text{when } \varepsilon \le -1.5194640071230868 \cdot 10^{-06} \\ \cos x \cdot \left(\varepsilon - \frac{1}{6} \cdot {\varepsilon}^3\right) - \left(\frac{1}{2} \cdot \sin x\right) \cdot {\varepsilon}^2 & \text{when } \varepsilon \le 6.019887702751239 \cdot 10^{-12} \\ \log \left(e^{\sin x \cdot \cos \varepsilon}\right) + \left(\cos x \cdot \sin \varepsilon - \sin x\right) & \text{otherwise} \end{cases}\)

    if eps < -1.5194640071230868e-06 or 6.019887702751239e-12 < eps

    1. Started with
      \[\sin \left(x + \varepsilon\right) - \sin x\]
      29.6
    2. Using strategy rm
      29.6
    3. Applied sin-sum to get
      \[\color{red}{\sin \left(x + \varepsilon\right)} - \sin x \leadsto \color{blue}{\left(\sin x \cdot \cos \varepsilon + \cos x \cdot \sin \varepsilon\right)} - \sin x\]
      0.7
    4. Applied associate--l+ to get
      \[\color{red}{\left(\sin x \cdot \cos \varepsilon + \cos x \cdot \sin \varepsilon\right) - \sin x} \leadsto \color{blue}{\sin x \cdot \cos \varepsilon + \left(\cos x \cdot \sin \varepsilon - \sin x\right)}\]
      0.7
    5. Using strategy rm
      0.7
    6. Applied add-log-exp to get
      \[\color{red}{\sin x \cdot \cos \varepsilon} + \left(\cos x \cdot \sin \varepsilon - \sin x\right) \leadsto \color{blue}{\log \left(e^{\sin x \cdot \cos \varepsilon}\right)} + \left(\cos x \cdot \sin \varepsilon - \sin x\right)\]
      0.8

    if -1.5194640071230868e-06 < eps < 6.019887702751239e-12

    1. Started with
      \[\sin \left(x + \varepsilon\right) - \sin x\]
      44.7
    2. Using strategy rm
      44.7
    3. Applied sin-sum to get
      \[\color{red}{\sin \left(x + \varepsilon\right)} - \sin x \leadsto \color{blue}{\left(\sin x \cdot \cos \varepsilon + \cos x \cdot \sin \varepsilon\right)} - \sin x\]
      44.4
    4. Applied associate--l+ to get
      \[\color{red}{\left(\sin x \cdot \cos \varepsilon + \cos x \cdot \sin \varepsilon\right) - \sin x} \leadsto \color{blue}{\sin x \cdot \cos \varepsilon + \left(\cos x \cdot \sin \varepsilon - \sin x\right)}\]
      44.4
    5. Using strategy rm
      44.4
    6. Applied add-cube-cbrt to get
      \[\color{red}{\sin x \cdot \cos \varepsilon + \left(\cos x \cdot \sin \varepsilon - \sin x\right)} \leadsto \color{blue}{{\left(\sqrt[3]{\sin x \cdot \cos \varepsilon + \left(\cos x \cdot \sin \varepsilon - \sin x\right)}\right)}^3}\]
      44.8
    7. Applied simplify to get
      \[{\color{red}{\left(\sqrt[3]{\sin x \cdot \cos \varepsilon + \left(\cos x \cdot \sin \varepsilon - \sin x\right)}\right)}}^3 \leadsto {\color{blue}{\left(\sqrt[3]{(\left(\sin x\right) * \left(\cos \varepsilon\right) + \left(\sin \varepsilon \cdot \cos x - \sin x\right))_*}\right)}}^3\]
      44.8
    8. Using strategy rm
      44.8
    9. Applied fma-udef to get
      \[{\left(\sqrt[3]{\color{red}{(\left(\sin x\right) * \left(\cos \varepsilon\right) + \left(\sin \varepsilon \cdot \cos x - \sin x\right))_*}}\right)}^3 \leadsto {\left(\sqrt[3]{\color{blue}{\sin x \cdot \cos \varepsilon + \left(\sin \varepsilon \cdot \cos x - \sin x\right)}}\right)}^3\]
      44.8
    10. Applied taylor to get
      \[{\left(\sqrt[3]{\sin x \cdot \cos \varepsilon + \left(\sin \varepsilon \cdot \cos x - \sin x\right)}\right)}^3 \leadsto \varepsilon \cdot \cos x - \left(\frac{1}{6} \cdot \left({\varepsilon}^{3} \cdot \cos x\right) + \frac{1}{2} \cdot \left({\varepsilon}^2 \cdot \sin x\right)\right)\]
      0.1
    11. Taylor expanded around 0 to get
      \[\color{red}{\varepsilon \cdot \cos x - \left(\frac{1}{6} \cdot \left({\varepsilon}^{3} \cdot \cos x\right) + \frac{1}{2} \cdot \left({\varepsilon}^2 \cdot \sin x\right)\right)} \leadsto \color{blue}{\varepsilon \cdot \cos x - \left(\frac{1}{6} \cdot \left({\varepsilon}^{3} \cdot \cos x\right) + \frac{1}{2} \cdot \left({\varepsilon}^2 \cdot \sin x\right)\right)}\]
      0.1
    12. Applied simplify to get
      \[\varepsilon \cdot \cos x - \left(\frac{1}{6} \cdot \left({\varepsilon}^{3} \cdot \cos x\right) + \frac{1}{2} \cdot \left({\varepsilon}^2 \cdot \sin x\right)\right) \leadsto \cos x \cdot \left(\varepsilon - \frac{1}{6} \cdot {\varepsilon}^3\right) - \left(\frac{1}{2} \cdot \sin x\right) \cdot {\varepsilon}^2\]
      0.1

    13. Applied final simplification

  1. Removed slow pow expressions

Original test:


(lambda ((x default) (eps default))
  #:name "NMSE example 3.3"
  (- (sin (+ x eps)) (sin x))
  #:target
  (* 2 (* (cos (+ x (/ eps 2))) (sin (/ eps 2)))))