Consider the following relations among the angles a., [3 and y made by a vector with the coordinate axes. I. `cos 2

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Q 2806823778.     Consider the following relations among the
angles a., [3 and y made by a vector with the
coordinate axes.

I. `cos 2 alpha + cos 2 beta + cos 2 gamma = - 1`

II. `sin^2 alpha +sin^2 beta +sin^2 gamma = 1`

Which of the above statement(s) is/are correct?
A

Only I

B

Only II

C

Both I and II

D

Neither I nor II

HINT


Solution
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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