### Graphs Tomorrow

I found a really neat site that illustrates the geometric interpretation of sine, cosine, tangent and cotangent that we we're talking about in class last Friday. Check it out! You can change the lengths of the lines in the figure by clicking on the point on the circle where the "sin

*x*" and "cos

*x*" lengths intersect.

Tomorrow we're going to talk about how to graph the sine, cosine and tangent functions. You can do a little preview here.

If you missed class today; you should know there was a quiz and there will be a unit test as early as Thursday.

## 3 Comments:

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I agree to you mr. k, it is a pretty neat link. As I move the lines in the unit circle, it reminds me of the sundial. when the noon strikes, the the arm of the sundial cast shadow on the 12 telling us it is 12 noon. While in the unit circle, when the length of the tangent line increases or reaches pi/2, it forms straight line directly to the pi/2.

7:40 PM

Graphing the Sine and Cosine Functions..... for me, I think is like theSinusoidal Graphs, but it is rather complicated...Dave's Short Trig Coursereally is a pretty neat site.. but only thecotangent functionwas added besides sin, cos and tan. i wonder where was thesecant and cosecant functionsin the unit circle?## Post a Comment

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