Yash Jain
Last Activity: 10 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.