What is the cosine of the angle which the vector `sqrt(2) hat i+ hat j+ hat k` makes with y-axis?

Explanation

To find the cosine of the angle that the vector \(\sqrt{2} \hat{i} + \hat{j} + \hat{k}\) makes with the y-axis, we can follow these steps:

### Step 1: Identify the vector
The given vector is:
\[ \vec{A} = \sqrt{2} \hat{i} + \hat{j} + \hat{k} \]

...