Trigonometry concepts in class (video lectures)

Pankaj sent a mail telling me about a cool website which has cool animations and videos for various subjects.Here are video lectures of trigonometry ...

	An Intro to the Cartesian Coordinate System-Plotting points	Trigonometry	5m 00s
	The Pythagorean Theorem-Pythagorean triples	Trigonometry	5m 43s
	The Distance Formula	Trigonometry	6m 43s
	Determining if three in the plane make up a right triangle	Trigonometry	4m 47s
	Another example using the distance formula	Trigonometry	6m 36s
	The definition of a function	Trigonometry	7m 54s
	Determining if a graph represents a function	Trigonometry	7m 23s
	Finding the Domain and Range using the graph of a function	Trigonometry	7m 23s
	Evaluating a function	Trigonometry	6m 25s
	Finding the Domain of a Function	Trigonometry	7m 10s
	A Library of Function	Trigonometry	5m 34s
	Horizontal and Vertical Shifts	Trigonometry	6m 27s
	Stretches and Compressions	Trigonometry	6m 10s
	Reflections across the x or y axis	Trigonometry	3m 54s
	Examples	Trigonometry	8m 30s
	How to measure an angle	Trigonometry	5m 52s
	Coterminal angles	Trigonometry	7m 28s
	Central Angles and the definition of a radian	Trigonometry	8m 59s
	Converting degrees into radians	Trigonometry	5m 12s
	Converting radians into degrees	Trigonometry	4m 31s
	The 45-45-90 right triangle	Trigonometry	3m 04s
	The 30-60-90 and 60-30-90 right triangles	Trigonometry	2m 51s
	Similar Triangles	Trigonometry	5m 32s
	Finding the missing sides of the special right triangles	Trigonometry	7m 10s
	The Unit Circle	Trigonometry	7m 14s
	Given an angle, find corresponding points on the unit circle	Trigonometry	12m 08s
	The first three trigonometric ratios (sin,cos,tan)	Trigonometry	8m 14s
	Three more trigonometric ratios (csc, sec, cot)	Trigonometry	5m 09s
	Evaluating the Trig ratios using the unit circle	Trigonometry	6m 54s
	Evaluating the Trig ratios at 0,90,180,270,360	Trigonometry	6m 27s
	Evaluating the Trig ratios at increments of 45 degrees	Trigonometry	9m 37s
	Evaluating the Trig ratios at increments of 30 degrees	Trigonometry	10m 46s
	Evaluating the Trig ratios at increments of 60 degrees	Trigonometry	4m 18s
	Finding the missing sides and areas of right triangles	Trigonometry	7m 34s
	Equations of lines	Trigonometry	6m 43s
	The graph of f(x) = sin x	Trigonometry	5m 32s
	The graph of f(x) = cos x	Trigonometry	4m 29s
	The graph of f(x) = tan x	Trigonometry	7m 21s
	The definition of amplitude of a sine and cosine function	Trigonometry	1m 46s
	Graphing sine and cosine functions with amplitude other than	Trigonometry	7m 36s
	The definition of period	Trigonometry	2m 56s
	Graphing y=sinbx or y=cosbx	Trigonometry	5m 16s
	Vertical Translations	Trigonometry	5m 27s
	Horizontal Translations and the definition of phase shift	Trigonometry	6m 05s
	Sketching functions of the form Y=a sin (x-b) + c	Trigonometry	6m 45s
	Sketching functions of the form Y=a sin b(x-c) + d	Trigonometry	7m 12s
	Reciprocal and Quotient Identities	Trigonometry	6m 12s
	Pythagorean identities	Trigonometry	5m 52s
	Verifying Trigonometric Identities	Trigonometry	10m 12s
	A review of 1-1 functions	Trigonometry	3m 42s
	Inverse functions and some examples	Trigonometry	5m 29s
	Properties of inverse functions	Trigonometry	5m 38s
	The definition of the inverse sine function	Trigonometry	12m 42s
	The definition of the inverse cosine function	Trigonometry	8m 17s
	The definition of the inverse tangent function	Trigonometry	10m 44s
	Expressions involving inverse functions values	Trigonometry	8m 23s