How to use the unit circle to evaluate for cotangent when undefined

The video tutorial covers the concept of periods in trigonometric functions, specifically sine and cosine, using the unit circle. It explains coterminal angles, which share the same initial and terminal sides, and how they relate to periods. The tutorial also discusses the cotangent function, highlighting how certain values can be undefined due to division by zero.

What is the definition of coterminal angles?

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How can you express an angle greater than 2π or 360 degrees in terms of periods?

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Explain the relationship between cotangent of 720 degrees and cotangent of 0 degrees.

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What happens to the value of cotangent when the angle is at 0 degrees?

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Why is the cotangent function undefined at certain angles?

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