Steve's basic SIN/COS Tutorial

[vince]

not bad Steve, you could throw in a couple more formulas, namely

the rotation matrix -- rotate any point (x,y) along the origin:

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newx = x*cos(angle) - y*sin(angle)
newy = x*sin(angle) + y*cos(angle)

bonus points if you derive it from scratch

and also, using trig to model any kind of oscillatory behavior, a radians crash course

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y = A * sin ( 2*pi * f * t )

where A is amplitude, or "height" of the sine wave, f for frequency or oscillation cycles/time with t being time or some other free parameter

and that's a fair overview of most of the trig you might require as a programmer