Part 3: Shows how to solve absolute value inequalities, example abs(2x-1)<5

Shows how to convert from a binary number to its corresponding decimal number. Two examples are given.

Six short examples useful as preparation for implicit differentiation. Some require the chain rule, others are straightforward differentiations.

Starting with an equation quadratic in x and y, this screencast shows the general form of a circle, to which the equation has to be converted. It then shows how to complete the square in x and in y and how to read off the ...

Shows how to check if a polynomial is even or odd, and extends this to a rational function.

Part 2: Shows how to solve absolute value inequalities, example abs(1-2x)>-3

This screencast demonstrates how Sarrus's Rule can be used to find the determinant of a 3x3 matrix. This is an alternative to the usual method of going via 2x2 sub-determinants.

This screencast explains how differentiation requiring combinations (or multiple uses) of the product, chain and quotient rules can be made simpler by using logarithmic differentiation. This method relies on log rules to ...

Shows how to find a particular form of the chain rule that is needed, depending on the type of problem that is posed. Uses a tree diagram to develop the rule.

Two examples of simplifying expressions of the form trig(inverse trig), using right angled triangles. The result is in algebraic form without trig functions.