Proof of the Trig Sum and Difference Formulas

Angles and Radians

Aug 18, 2013

Find out how to convert fractions of a degree with Degrees, minutes and seconds, and enter the wonderful...View more

Exp and Log Functions

Mar 21, 2013

Video at Archive.org Video at YouTube Solving for an unknown in the exponent requires logarithms! 19 Prob...View more

Matrix Determinants

Mar 7, 2013

Matrix Determinant Video Use Cramer's Rule to solve a system of equations with Leinitz and Sarrus' method...View more

Fancy Trig Equations

Dec 2, 2011

To solve for an unknown angle we will use all sorts of clever tricks, employing the trig formulas and ide...View more

Trig Substitution & Identities

Oct 22, 2011

Using the trig identities for substituting a Pythagorean looking expression.

Arithmetic Sequnces

Mar 20, 2011

Arithmetic Sequences

Mar 20, 2011

An Arithmetic Sequence is a pattern where each element changes by adding a constant. Here are examples, a...View more

Trig with Vectors, Complex Numbers, apps (Precalc 6)

Dec 4, 2010

Using the law of sines and cosines, we explor vectors, complex numbers and applications (aka "Word proble...View more