Consider the following statements among the angles `alpha , beta` and `gamma` made by a veftor with the coordinate axe

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Q 2319156910.     Consider the following statements among the
angles `alpha , beta` and `gamma` made by a veftor with the
coordinate axes I


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

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

Which of the abmJe statements is/are correct?
NDA 2011 Paper 1
A

Only I

B

Only II

C

Both I and II

D

Neither I ror II

HINT


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

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