Question

if a vector 2icap +3jcap+8kcap is perpendicular to the vector 4icap-4jcap+alpha kcap then value of alpha is​

Answer 1

Answer:

1/2

Explanation:

a = 2î +3j +8k

b=4i -4j + alpha k

a.b=0 (perpendicular)

2×4 +3×(-4) + 8×(alpha)=0

8-12+8alpha=0

8alpha=4

alpha=1/2