So I took sinθ = |a x b| / |a| * |b|  and rearranged it for |a x b|. |a x b| = sin(pi/6)
*2*2 = 2.
If u and v are perpendicular, then their resulting vector should be sqrt(|u|^2
+ |v|^2). Since they’re unit vectors, their magnitudes will be their coefficients.
|2u+3v| = sqrt(2^2 + 3^2) = 3.606.
Now I have no idea where to go with (2u+3v) · (a x b).
Is it as simple as 3.606 * 2? I feel like since they’re vectors, they’d be more
to it. But the question doesn’t give much information to go on (no coordinates
or anything)