Source: wikibot/pythagorean-trigonometric-identity
= Pythagorean trigonometric identity
{wiki=Pythagorean_trigonometric_identity}
The Pythagorean trigonometric identities are fundamental relationships between the sine and cosine functions that stem from the Pythagorean theorem. They are derived from the fact that for a right triangle with an angle \\( \\theta \\), the following equation holds: \\\[ \\sin^2(\\theta) + \\cos^2(\\theta) = 1 \\\] This is the most basic Pythagorean identity.