Khan/khan-exercises — Issue #9411: Trigonometry challenge - Trig challenge
Author: KhanBugz
Created: 2011-12-23 21:10:55+00:00
State: open
Labels: ie8, not-showing, win7

I can see code rather than the problem. f(x) is graphed below.

graphInit({
range: [ HRANGE, VRANGE ],
scale: [ PIXHSCALE, PIXVSCALE ],
axisArrows: "<->",
gridStep: [ HSCALE * PI / 4, .5 ],
tickStep: [ 2, 1 ],
labelStep: [ 2, 2 ],
unityLabels: true,
xLabelFormat: piFraction
});

// draw sin/cos curve
style({
stroke: "#a3a3ff",
strokeWidth: 2
}, function() {
plot( function( x ) {
return eval( FUNCS );
}, [ -HRANGE, HRANGE ] );
});

What is f(x)?

f(x)=	VSCALE	FN	(\	1 / HSCALE	\ x)

[trigonometry_challenge.html?seed=135&problem=25 (graphs_of_sine_and_cosine)](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/trigonometry_challenge.html?seed=135&problem=25&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/trigonometry_challenge.html?seed=135&problem=25&debug&activity=undefined)

undefined

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