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Dimostrare le identità trigonometriche


Definition

Per dimostrare un'identità trigonometrica, bisogna dimostrare che un lato dell'equazione può essere trasformato nell'altro lato.

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Problems Solved

$\cos^2u\left(1+\tan^2u\right)=1$
$1=sec^4x-tan^4x-2tan^2x$
$\sin\left(x\right)+\sin\left(x\right)\cdot\cot^2\left(x\right)=\csc\left(y\right)$
$\cot x\left(\sin x+\tan x\right)=1+\cos x$
$cot^2xsec^2x=cot^2x+1$
$\sin\left(90-x\right)=\cos\left(x\right)$
$\tan\left(X-\frac{\pi}{2}\right)=-\cot\left(X\right)$
$\frac{\cot\left(a\right)+\csc\left(a\right)\cos\left(a\right)}{\cot\left(a\right)}=2$

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