The direction cosines of the vector a^{\to}=-2i^{\^}+j^{\^}-5k^{\^} are

Correct Answer is : −2√30, 1√30, −5√30

{-2}/\sqrt8, 1/\sqrt8, {-5}/\sqrt8

{-2}/\sqrt30, 1/\sqrt30, {-5}/\sqrt30

2/\sqrt8, {-1}/\sqrt8, 5/\sqrt8

{-2}/\sqrt30, {-1}/\sqrt30, {-5}/\sqrt30

AP EAMCET Engineering 21 Sep 2020 Shift 1 Paper

Section: Mathematics

Question : 70 of 160

Marks: +1, -0

The direction cosines of the vector

→

=−2

−5

are

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