Friday, May 20, 2011

Cotangent Function

Cotangent function is a reciprocal for tangent function. If , then . Generally, cotangent function can be written as .

Now, consider only ,
as tan(x) approaches to 0, cot(x) approaches ∞ or -∞,
as tan(x) approaches ∞ or -∞, cot(x) approaches 0.

You may change the values of a = 1, b = 1, c = 0 and d = 0 and think about the construction of cot(x) from tan(x). After that, you may alter the values to look at the shifting, scaling or reflecting of the graphs.


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Slide the values of a, b, c and d to observe the changes of the graph . What can you say about the effects of these values towards the function cot (x)?


Betty, Created with GeoGebra

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