A line makes angles , and with the positive directions of the coordinate axes. If a=( ^2 ) i+( ^2 ) j+( ^2 ) k and b= i+ j+ k, then what is a b equal to?

NDA 2025 Mathematics question

A line makes angles , and with the positive directions of the coordinate axes. If and , then what is equal to?

Answer: (D)

. Since $α,

Create a free account to read the complete working, and practise questions like this in a timed test.

Question ID VK-030077