(All Trigonometry Formula)

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http://www.w3.org/1998/math/mathML
$$ {J(\theta) =\frac{1}{2m} [\sum^m_{i=1}(h_\theta(x^{(i)}) – y^{(i)})2 + \lambda\sum^n_{j=1}\theta^2_j} $$

x
2

f=\frac{-b\pm\sqr{b^2-4ac}{2a}}

https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.4/MathJax.js?config=default