Question

$\\ \: \: \: \left|\begin{array}{cc}\sf cos\:x & \sf\:sin\:x\\\sf\:-\:sin\:x & \sf\:cos\:x\end{array}\right| = ?$
​

Answer 1

Answer:

The answer will be 0,

I think.

Because truly mate what is the question still I'm in dilemma.

Answer 2

[tex]\left| \begin{array}{cc} \cos\theta & \sin\theta \\ -\sin\theta & \cos\theta \end{array} \right| = 1[/tex]