The scalar product of the vector with a unit vector along the sum of the vectors and is equal to 1. Find the value of λ and hence find the unit vector along .

The scalar product with a unit vector along the sum of the vectors and is equal to 1

To Find: Find the value of λ

Explanation:

Now,

Let r be unit vector along

Since The scalar product of a vector a with unit vector is 1

8λ=8

λ=1

Then, the vector,

Hence, along b and c