If and find the value of

Question

Philoid · Accepted Answer

Given and

We need to find the magnitude of the vector.

Recall the cross product of two vectors and is

Here, we have (a₁, a₂, a₃) = (3, 4, 0) and (b₁, b₂, b₃) = (1, 1, 1)

Recall the magnitude of the vector is

Now, we find.

Thus,