For the following exercises, algebraically determine whether each of the given expressions is a true identity. If it is not an identity, replace the right-hand side with an expression equivalent to the left side. Verify the results by graphing both expressions on a calculator. 2cos(2x)cos x + sin(2x)sin x = 2 sin x

Chapter 7, 7.4 Exercises #47

For the following exercises, algebraically determine whether each of the given expressions is a true identity. If it is not an identity, replace the right-hand side with an expression equivalent to the left side. Verify the results by graphing both expressions on a calculator.

2cos(2x)cos x + sin(2x)sin x = 2 sin x

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Precalculus

1st Edition

Authors: Jay Abramson

ISBN: 9781938168345