A

9000086603

Level: 
A
Determine the truth values of propositions \(a\) and \(b\) if you know that the compound proposition \[ \neg a \wedge b \] is true.
The statement \(a\) is false, \(b\) is true.
Both statements are true.
The statement \(a\) is true, \(b\) is false.
Both statements are false.

9000086703

Level: 
A
Identify the optimal substitution which simplifies the following equation as much as possible. \[ 5\mathop{\mathrm{cotg}}\nolimits (30^{\circ }- 4y) = 0 \]
\(30^{\circ }- 4y = t\)
\(\mathop{\mathrm{cotg}}\nolimits (30^{\circ }- 4y) = t\)
\(\mathop{\mathrm{cotg}}\nolimits (30^{\circ }- 4y) = 0\)
\(4y = 0\)