Test Index

UPSC NDA I 2023 Mathematics Solved Paper

Show Para Hide Para

Consider the following for the next two (02) items that follow :

Let a vector

\vec{a}=4\hat{i}-8\hat{j}+\hat{k}

make angles

\alpha, \beta, \gamma

with the positive directions of

x, y, z

axes respectively.

[NDA I 2023]

© examsnet.com

Question : 67 of 120

Marks: +1, -0

What is

\cos \alpha

$\;\frac{1}{3}$
$\;\frac{4}{9}$
$\;\frac{5}{9}$
$\;\frac{2}{3}$

Go to Question:

Prev Question

Next Question