Introduction

especially true when modelling waves and alternating current circuits. When the root-mean-square (rms) value of a waveform, or signal is to be calculated, you will often find this results in an integral of the form

$\int \; <!--nolimits\; -->{sin}^{2}tdt$

In this Section you will learn how such integrals can be evaluated.

Prerequisites

• be able to find a number of simple definite and indefinite integrals
• be able to use a table of integrals
• be familiar with standard trigonometric identities

Learning Outcomes

• use trigonometric identities to write integrands in alternative forms to enable them to be integrated

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