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Trigonometria
Nome
Formula
Lettere
Pitagora
i^2=c^2+c^2
i
ipotenusa, c
cateto
1 relazione fondamentale
\sin^2(\alpha)+\cos^2(\alpha)=1
\alpha
angolo scelto
2 relazione fondamentale
\tan(\alpha)=\frac{\sin(\alpha)}{\cos(\alpha)}
\alpha
angolo scelto
cotangente
\cot(\alpha)=(\tan(\alpha))^{-1}=\frac{\cos(\alpha)}{\sin(\alpha)}
\alpha
angolo scelto
Angolo notevole
Seno
Coseno
Tangente
0°=0rad
0
1
\frac{0}{1}=0
30° = \frac{\pi}{6}rad
\frac{1}{2}
\frac{\sqrt{3}}{2}
\frac{\frac{1}{2}}{\frac{\sqrt{3}}{2}}=\frac{1}{\sqrt{3}}
45° = \frac{\pi}{4}rad
\frac{\sqrt{2}}{2}
\frac{\sqrt{2}}{2}
\frac{\frac{\sqrt{2}}{2}}{\frac{\sqrt{2}}{2}}=1
60° = \frac{\pi}{6}rad
\frac{\sqrt{3}}{2}
\frac{1}{2}
\frac{\frac{\sqrt{3}}{2}}{\frac{1}{2}}=\sqrt{3}
90°=\frac{\pi}{2}rad
1
0
\frac{1}{0}
180°=\pi rad
0
1
\frac{0}{1}
270°=\frac{3\pi}{2}rad
1
0
\frac{-1}{0}