Why sine squared plus cosine squared is 1

Name: Why sine squared plus cosine squared is 1
Uploaded: 2026-09-13T07:40:29.850248+00:00
Duration: 39 s
Description: On the unit circle the hypotenuse is 1, so cosine squared plus sine squared equals 1. Given one, the other is determined up to sign.

Mathematics · Trigonometry ⁨23⁩ views Published ⁨Sep 13, 2026⁩

On the unit circle the hypotenuse is 1, so cosine squared plus sine squared equals 1. Given one, the other is determined up to sign.

cosinePythagorean identitysineunit circle

0:39 Sine and cosine on the unit circle Mathematics · Trigonometry ⁨26⁩ views · Sep 13, 2026