JEE Main 2012 — Three Dimensional Geometry Question with Solution
JEE Main 2012 (19 May Online)
Question
If the three planes and contain a common line, then is equal to
Choose an option
Show full solutionCorrect option: B
Correct answer
B
Step-by-step explanation
Let the direction ratios of the common line be and .
Subtracting (3) from (1), we get
Now, value of can not be zero because if then
which is not possible.
Hence,
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This is a previous-year question from JEE Main 2012, covering the Three Dimensional Geometry chapter of Mathematics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.