First slide

Vectors

Question

What is the angle between (P + Q) and (P X Q)?

Moderate

A

Zero
B

$\frac{π}{2}$
C

$\frac{π}{4}$
D

$π$

Solution

P X Q is perpendicular to the plane formed by P and Q.
P + Q lies in this plane. Hence, P + Q is perpendicular to P x Q.

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