Question

What is the angle between (Ⓡ+) and (PxO) ?
(10 (2) 7 (3) 7 (4)​

Answer 1

Answer:

If the position vectors of P and Q are

i

+2

j

−7

k

and 5

i

−3

j

+4

k

respectively then the cosine of the angle between

PQ

and z-axis is