Let Q be the image of the point P(-2,1,-5) in the plane `3x-2y+2z+1=0`
Consider the following :
Consider the following :
1. The direction ratios of the line segment PQ are lt 3,-2,2 gt.
2. The sum of the squares of direction cosines of the line segment PQ is unity.
Which of the above statements is/are correct?

Options

A. 1 only
B. 2 only
C. Both 1 and 2
D. Neither 1 nor 2

Answer

C

Explanation

From (i) above, I is corrct.
We know that,
Sum of direction cosines of the line segment PQ = 1.