Question

A = 3i-k, B = i + 2j are adjacent sides of a parallelogram, its area is :)​

Answer 1

Answer:

√41

Step-by-step explanation:

A.B =  (3i-k).( i + 2j) = 3 = √10√5 cos∝

cos∝ = 3/√50 , sin∝ = √41/√50

area = ABsin∝ = √50×√41/√50 = √41