Exercises: Prove the Laws of Sines and Cosines

Grade 10·21 problems·~35 min·Common Core Math - HS Geometry·standard·hsg-srt-d-10

Work through problems with immediate feedback

Recall and Warm-Up

Which of the following is the Pythagorean identity used in the Law of Cosines proof?

$\sin^2\theta + \cos^2\theta = 1$

$\sin^2\theta - \cos^2\theta = 1$

$\sin\theta \cdot \cos\theta = 1$

$\sin\theta + \cos\theta = 1$