Back to 9.5 Solving Trigonometric Equations

9.5 Exercise 192

Avg difficulty 2.5

Find all exact solutions to the equation on $\left[0 , 2 \pi\right) .$

$\cos^{2} x - \sin^{2} x - 1 = 0$

OpenStax Algebra and Trigonometry 2e, 9.5 Solving Trigonometric Equations, exercise 192

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Adapted from College Algebra © 2021 Rice University. Licensed under CC BY 4.0. Sources: College Algebra 2e, Algebra and Trigonometry 2e, Precalculus 2e, College Algebra with Corequisite Support 2e. Imported at revision 4922e46.