Khan Academy on a Stick : Parametric equations and polar coordinates

Khan Academy on a Stick

Trigonometry and precalculus

Graphing lines
Functions and their graphs
Polynomial and rational functions
Exponential and logarithmic functions
Basic Trigonometry
Trig identities and examples
Parametric equations and polar coordinates
Conic sections
Systems of equations and inequalities
Sequences and induction
Probability and combinatorics
Imaginary and complex numbers
Hyperbolic trig functions
Limits

Parametric Equations 1
cc

Introduction to parametric equations
Parametric Equations 2
cc

Eliminating the parameter
Parametric Equations 3
cc

Removing the parameter from a more interesting example
Parametric Equations 4
cc

Parametric Equations that "move" along the same path

Parametric equations

Here we will explore representing our x's and y's in terms of a third variable or parameter (often 't'). Not only can we describe new things, but it can be super useful for describing things like particle motion in physics.

Polar Coordinates 1
cc

Introduction to polar coordinates
Polar Coordinates 2
cc

Conversion from Cartesian to Polar Coordinates
Polar Coordinates 3
cc

Converting between Cartesian and Polar functions

Polar coordinates

Feel that Cartesian coordinates are too "square". That they bias us towards lines and away from cool spirally things. Well polar coordinates be just what you need!