# Riemann Integral of $\cos x$

by John H. Mathews (California State University, Fullerton) and Harris S. Shultz (California State University, Fullerton)

College Mathematics Journal
May, 1989

Subject classification(s): Calculus | Single Variable Calculus | Integration | Geometry and Topology | Trigonometry | Trigonometric Functions | Trigonometric Identities
Applicable Course(s): 4.11 Advanced Calc I, II, & Real Analysis

A direct proof that the integral of cosine is sine from the Riemann sums

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