ALTSM 22/03 Q91

ALTSM 22/03 Q91

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Grade:12th pass

1 Answers

Yash Jain
55 Points
9 years ago
The answer is D) 30o,45o
We know that for a vector, cos2a + cos2b + cos2c = 1 , (where a,b,c are the angles made by the vector from                                                                                          positive x,y,z axis resp.)
or cos2a + cos2b = sin2c
Now, 0 2c 2a + cos2b
This condition is followed by every given set except the D) one.
Hence, that is your answer.

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