Question

0.4. Detrmine a xb, given a
2i +3j and b 3i+5j​

Answer 1

Answer:

( a × b ) = k

Explanation :

( a × b ) = ( 2i + 3j) ×( 3i + 5j)

( a × b ) = 2i × 3i + 2i × 5j + 3j × 3i +3j × 5j

In vector product, i × i = 0 , j×j = 0 and k× k = 0

i × j = k, j × k = i, k × i = j and j × i = - k

So, ( a × b ) = 0 + 10k + 9 (-k)

( a × b ) = k

Answer 2

Answer

Answer is k

Explanation: