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Trigonometry


Definition

La trigonometria è una branca della matematica che studia le relazioni tra lunghezze e angoli dei triangoli.

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Problems Solved

$\left(\cos\left(x\right)\right)\left(\sec\left(x\right)-\cos\left(x\right)\right)=\sin^2\left(x\right)$
$\frac{cos\left(x\right)}{sen\left(x\right)}=\frac{1}{tan\left(x\right)}$
$2cos^2x=cos2x+1$
$cot^2t+1=\csc^2\left(t\right)$
$\frac{\cos\left(3x\right)}{\cos\left(x\right)}=1-4\left(\sin\left(x\right)^2\right)$
$sin2\left(x\right)=\frac{2cot\left(x\right)}{1+cot^2\left(x\right)}$
$-\sin^2x\cdot\sec^2\left(x\right)=-\tan^2\left(x\right)$

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Identità trigonometriche

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