Cousins of Sine

Some Cousins of Sine hyperbolic sine, sinh(x) https://en.wikipedia.org/wiki/Hyperbo... sinc function, https://en.wikipedia.org/wiki/Sinc_fu... sign function, https://en.wikipedia.org/wiki/Sign_fu... sine integral, https://en.wikipedia.org/wiki/Trigono... fresnel integral, https://en.wikipedia.org/wiki/Fresnel... Enjoy! T-shirts: https://teespring.com/stores/blackpen... my site: https://blackpenredpen.com twitter:   / blackpenredpen   Patreon:   / blackpenredpen   Blue Microphone: https://amzn.to/2DAbHYL black marker red marker: https://amzn.to/2UVLDCm