Question

A = 4i + 6j + k and B = 2i - 3j + Pk are perpendicular to each other. t value of P is

Answer 1

Answer:

p=10

Explanation:

as the two given vectors are perpendicular to each other their scalar product will be 0.

A. 4i+6j+1k

B=2i-3j+pk

A.B=(4*2)+(6*-3)+P

0=8-18+P

P=10

Answer 2

Answer: P=10

Explanation:

A = 4i + 6j + k and B = 2i - 3j + Pk are perpendicular to each other.

So angle between them is 90 which means that their dot product would be zero as cos 90 = 0

A.B=AB cos Ф

A.B=0

(4×2) + (6× -3) + (1×P) = 0

8 -18 + P=0

-10+P=0

P=10