Question

if a=4i +9j and b=3i+2j find (a) a.b (b) b.a (c) a.a (d) b.b​

Answer 1

Explanation:

a= 4i +9j & b=3i+2j

(a). a.b = (12+18) = 30

(b). b.a = (12+18) = 30

(c). a.a = (16+81) = 97

(d). b.b = (9+4) = 13

Hope it will help you...