Mathematics and Trigonometric Identities
Platonic Realms Math Academy
Integrator
MathForum.org
Algebra of Averages including root mean square, harmonic, and geometric mean
Trigonometric Identities
A good source for trigonometric identities and other math related pages.
Law of Cosines
Includes form for calculation using Law of Cosines.
Determinants
Determinants are defined only for square matrices. A matrix is an array of elements arranged in m rows and n columns. This explains how to calculate the determinant.
Matrix Multiplication -- from MathWorld
Logarithms and Significant Figures - For any log, the number to the left of the decimal point is called the characteristic, and the number to the right of the decimal point is called the mantissa. The characteristic only locates the decimal point of the number, so it is usually not included when determining the number of significant figures. The mantissa has as many significant figures as the number whose log was found.
Mathematics Encyclopedia Source of Trigonometric identities.
Cross ProductsAnother description of cross Products.
Cross Products
Logarithm Properties and equations.
Logarithms
Maple V Links
The Inverse Formula
Recall that the inverse of a square matrix A is the matrix A-1 such that AA-1 = A-1A = I. If such a matrix exists then it is unique, but it need not exist. A matrix which has an inverse is said to be invertible or non-singular.
Euler Angles -- from MathWorld
Rounding