OpenStax · Degrees, Radians & the Pythagorean Identity (Algebra and Trigonometry)
Worked example in the style of OpenStax Algebra and Trigonometry 2e — evaluating unit-circle values and confirming sin²θ + cos²θ = 1, with a note on the degrees-vs-radians trap.
Want to make this yours?
Remix "OpenStax · Degrees, Radians & the Pythagorean Identity (Algebra and Trigonometry)" into your own editable copy — tweak it, share it, make it yours.