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x- component of a vector vecA is twice o...

x- component of a vector `vecA` is twice of its y-component and `sqrt(2)` times of its z-component. Find out the angle made by the vector from y-axis.

A

`cos^(-1)""((2)/(sqrt(7)))`

B

`cos^(-1)""((1)/(sqrt(7)))`

C

`cos^(-1)""((1)/(sqrt(6)))`

D

`cos^(-1)""((2)/(sqrt(6)))`

Text Solution

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The correct Answer is:
B
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