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### Question Asked by a Student from EXXAMM.com Team

** 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 **