Question

Semana 2 de matematica,me ajudem​

Answer 1

$\left[\begin{array}{ccc}senx&cosx&0\\-cosx&senx&0\\senx-cosx&senx+cosx&1\end{array}\right]$

Então

$\left[\begin{array}{ccc}senx&cosx&0\\-cosx&senx&0\\senx-cosx&senx+cosx&1\end{array}\right]\\\\\Rightarrow d=senx^2+0+0-0-0+cosx^2\Rightarrow d=senx^2+cosx^2\\\Rightarrow d=1$

$\forall x\Rightarrow d=1$