Exam Review Determine which function is undefined

The video tutorial explains how to determine which trigonometric functions are undefined by exploring the concept of asymptotes. It highlights that sine and cosine are always defined, while tangent, cosecant, and secant have points where they are undefined. The tutorial uses the unit circle to analyze these points, emphasizing the importance of understanding the coordinates and their implications for function definitions.

Explain why cosecant of 90 degrees is considered undefined.

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How does the unit circle help in understanding the undefined points of trigonometric functions?

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