Geometria e trigonometria

MatematicaLesson 3 of 3

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1. Relazione fondamentale della trigonometria

Per qualsiasi angolo alpha vale sin^2(alpha) + cos^2(alpha) = 1.

Worked example

Se sin(alpha) = 3/5 in un triangolo rettangolo, cos(alpha) = sqrt(1 - 9/25) = 4/5.

1.Per ogni angolo reale alpha, la somma tra sin^2(alpha) e cos^2(alpha) è sempre uguale a 1.

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