tan (x) 6 3Dx 3 N cot(x) 4 -10 -8 -6 -2 10 powered by desmos +
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter5: Inverse, Exponential, And Logarithmic Functions
Section5.3: The Natural Exponential Function
Problem 20E
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Why does cot(pi/2)=0? Because cot(x)=1/tan(x), I assumed that because tan(pi/2)=undefined, then 1/undefined is also undefined. Perhaps this has to do with a limit as x approaches 0 of 1/1/x which equals zero. I'm having trouble connecting the picture attached to the unit circle, how I go from the undefined y-axis with tangent, to the 0 x-axis when in terms of cotangent.
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You are thinking in a wrong way. Undefined and infinity both are different things. For finding the value of tan(π/2) on the unit circle, you would essentially be constructing this argument:
tan(π/2)=sin(π/2)/cos(π/2)=1/0 = infinity
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