OpenStax, Algebra and Trigonometry 2e §9.5 Solving Trigonometric Equations · Try It 3 · Trigonometry · Identities

Solving Trigonometric Equations · Try It 3

Solve $cos θ = - 0.2.$

~5 minWritten answer · compare with the solution

OpenStax, Algebra and Trigonometry 2e · §9.5 Solving Trigonometric Equations · Try It 3

Stuck? A gentle nudge

No hints for this one.

Something off?

Workspace

Your working

Check your full solution

Upload photos of your handwritten work or a PDF, and Lemma will read it and tell you whether it's right — and where it first goes wrong if not.