what is the difference between direction cosines and direction ratios??

Dear Student!

@Sumayya: Your friend has given the correct answer.

@Utkarsh: Good effort! Keep posting!

In addition to the answer provided by your friend, keep this in mind too.

For any vector r = ai + bj + ck, its direction ratios are a, b and c. Then direction cosines are l, m and n, where,

Cheers!!!