Question

Q7 Q11.) Use the dot product to determine whether v and w are orthogonal.

Answer 1

Dot product of two orthogonal vectors is always zero.

So let's do dot product:

v·w = (8i + 7j) · (6i - j) = (8)(6) + (7)(-1) = 41 which is not zero

So v and w are not orthogonal.

Hope this helps.