AP EAMCET2011MathematicsThree Dimensional Geometry

If the angles made by a straight line with the coordinate axes are , 2 - , , then is equal to

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Correct answer

C. 2

Step-by-step solution

We know that, if , , are angles of a line which makes from the coordinate axes But, given = , = 2 - , = From Eq. (i) ^2 + ^2 ( 2 - )+ ^2 =1 array cc & ( ^2 + ^2 )+ ^2 =1 & ^2 =0 & =0= 2 & = 2 array

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