OpenStax, Algebra and Trigonometry 2e §7.4 The Other Trigonometric Functions · Exercise 44 · Trigonometry · Unit circle

The Other Trigonometric Functions · Exercise 44

Use reference angles to evaluate the expression.

If $cos t = \frac{1}{2},$ what is the $cos (- t) ?$

Its source prints no answer for this problem, so there's nothing to check against.

~8 minWritten answer · compare with the solution

OpenStax, Algebra and Trigonometry 2e · §7.4 The Other Trigonometric Functions · Exercise 44

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.