OpenStax, Algebra and Trigonometry 2e §7.2 Right Triangle Trigonometry · Exercise 10 · Trigonometry · Right triangles

Right Triangle Trigonometry · Exercise 10

Find the lengths of the missing sides if side $a$ is opposite angle $A,$ side $b$ is opposite angle $B,$ and side $c$ is the hypotenuse.

$cos B = \frac{4}{5}, a = 10$

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 · §7.2 Right Triangle Trigonometry · Exercise 10

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.