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alpha and beta are the angle made by a v...

`alpha` and `beta` are the angle made by a vector from positive x & positive y-axes redpectively. Which set of `alpha` and `beta` is not possible

A

`45^(@), 60^(@)`

B

`30^(@), 60^(@)`

C

`60^(@), 60^(@)`

D

`30^(@), 45^(@)`

Text Solution

Verified by Experts

The correct Answer is:
D
`alpha, beta` must satisfy `cos^(2)alpha+cos^(2)beta+cos^(2)gamma=1`
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