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### Course: Precalculus > Unit 10

Lesson 5: Determining limits using algebraic properties of limits: direct substitution# Limits of trigonometric functions

This video covers limits of trigonometric functions, focusing on sine, cosine, and tangent. It emphasizes that sine and cosine are continuous and defined for all real numbers, so their limits can be found using direct substitution. For tangent and cotangent, limits depend on whether the point is in their domain.

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