Some Useful Formulas

graph TB A[Some useful formulas] B[Algebra] C[Geometry] D[Trigonometry] E[Calculus] F[Statistics] A --> B A --> C A --> D A --> E A --> F B --> G["|a+b=b+a|Commutative Law"] B --> H["|a*(b+c)=a*b+a*c| Distributive Law"] C --> I["|A=πr^2| Area of Circle"] C --> J["|A=1/2bh| Area of Triangle"] D --> K["|sin^2(θ) + cos^2(θ) = 1| Pythagorean Identity"] E --> L["|d/dx of x^n = nx^(n-1)| Power Rule"] F --> M["|μ = ΣX/N| Mean"]