Question

Consider a three (3)dimensional vector and prove that the sum of squares of its direction cosines is equal to 1.​

Answer 1

Answer:

Show" that the direction cosines of a vector satisfies

cos2α+cos2β+cos2γ=1

I am stumped on these things:

"SHOW" that the direction cosines corresponds to a given vector to satisfy the relation above. ----> How do you "show" this? What does this mean? Does this mean to use the direction cosines of a vector?

I'm sure this is a proof but I don't know what the end result would look like or better, what I am expected to learn from this proof.

I am not looking for a mere answer but really an in-depth explanation of the problem.

Greatly appreciated. :)

Answer 2

Answer:

mark me as the brainliest..

thank you..