MATSEC AM Pure Mathematics Complete Prep Course — Lesson 55: Small angle approximations

An edge-weight lesson on the small angle approximations for sine, tangent and cosine in radians. It states sine x approximately x, tangent x approximately x, and cosine x approximately one minus x squared over two, explains why cosine needs a second order term, applies them to limits such as sine three x over x equals three and one minus cosine two x over x squared equals two, and traces the results to truncated Maclaurin series with rapidly shrinking error.

Lesson 55 of 158 in the MATSEC AM Pure Mathematics Complete Prep Course audio course from ExamPrepRise.

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