Consider the following relations among the angles\[\alpha \], \[\beta \] and \[\gamma \] 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 is/are correct?

Consider the following relations among the angles\[\alpha \], \[\beta

1.	Consider the following relations among the angles\[\alpha \], \[\beta \] and \[\gamma \] 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 is/are correct?
A.	Only I
B.	Only II
C.	Both I and II
D.	Neither I nor II
Answer» B. Only II

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Consider the following relations among the angles\[\alpha \], \[\beta \] and \[\gamma \] 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 is/are correct?

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