Lemma
EasyVectors in geometry
OpenStax, Algebra and Trigonometry 2e §10.8 Vectors · Example 15 · Geometry · Vectors in geometry

Finding the Dot Product of Two Vectors and the Angle between Them

Find the dot product of v_1 = 5i + 2j and v_2 = 3i + 7j. Then, find the angle between the two vectors.

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

~5 minWritten answer · check your work with Lemma

OpenStax, Algebra and Trigonometry 2e · §10.8 Vectors · Example 15

Stuck? A gentle nudge

No hints for this one.

Something off?
Workspace
Your working

Check your full solution

Attach photos of your pages (up to 3) or one PDF — or check what you typed above. Lemma reads the work and verifies the reasoning, not just the answer.

Your first check today doesn't need an account.

Your photos and PDFs are read once and not stored — only the transcription is kept.