A line in the 3-dimensional space makes an angle with both the x and y axes. Then the set of all values of is the interval :
As we learnt in
Direction Cosines -
If are the angles which a vector makes with positive X-axis,Y-axis and Z-axis respectively then are known as diresction cosines, generally denoted by (l,m,n).
- wherein
Let the direction angles be (
We get
So
Thus
Option 1)
This option is incorrect
Option 2)
This option is incorrect
Option 3)
This option is correct
Option 4)
This option is incorrect
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