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Need solution for RD Sharma Maths Class 12 Chapter 27 Straight Line of Space Excercise Fill in the blanks Question 11

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Answer :  \frac{x-2}{1}=\frac{y-1}{1}=\frac{z+1}{\sqrt{2}}

Hint :  Compare the given equation

Given :  ( 2 , 1 , -1 ) and making angles   \frac{\pi}{3}, \frac{\pi}{3} \text { and } \frac{\pi}{4}

Solution : So comparing with general Cartesian from of Eq.

                  a = 2 , b =1 , c = -1

                  another line passing through P ( 1 , 1 , 2)

                  we can assume it as position   vector and parallel to given  line so normal vector will be same .

                 Eq. of line is given by   \frac{x-x_{1}}{l}=\frac{y-y_{1}}{m}=\frac{z-z_{1}}{n}

                 Here   \begin{gathered} l ,m, n(1,1, \sqrt{2}) \\ \end{gathered}

                 \frac{x-2}{1}=\frac{y-1}{1}=\frac{z+1}{\sqrt{2}}

                                  

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