Cosine integral

The cosine integral is defined by $$\mathrm{Ci}(z) = -\displaystyle\int_z^{\infty} \dfrac{\cos t}{t} dt ; |\mathrm{arg} z|<\pi.$$

• Ci.png

  Graph of $\mathrm{arccos}$ on $(0,20)$.

Videos

Laplace transform of cosine integral

References

• Generalized Sine and Cosine Integrals