Question

MCQ (100)
Q60. A line makes angle a, B, y with
x-axis, y-axis and Z-axis hua
respectively then cos 2a + cos 2B + cos
2y is equal to
(A) 2.
(B) 1
(C) -2.
(D) -1


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Answer 1

Answer:

we can choose the options C... that isss. -2.

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