CUET Mathematics 2026 12th May Shift 2 PYQs

The angle between the two planes $x + y - z = 3$ and $3x + 2y + z = 5$ is :

If the lines $x = ay+b$, $z = cy+d$ and $x = py+q$, $z = ry+s$ are perpendicular, then $ap + cr$ is equal to

Let ABCD be a parallelogram with vertices $A(2,2,a), B(1,0,0), C(1,3,a)$ and D, where $a > 0$. If the area of parallelogram is 5 square units, then the value of $a$ is: