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If the two directional cosiness of a vec...

If the two directional cosiness of a vectors are `(1)/sqrt(2)` and `(1)/sqrt(3)` then the value of third directional consine is

A

`(1)/sqrt(6)`

B

`(1)/sqrt(5)`

C

`(1)/sqrt(7)`

D

`(1)/sqrt(10)`

Text Solution

Verified by Experts

The correct Answer is:
A
`cos^(2) gamma=1-cos^(2)alpha-cos^(2)beta`,
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