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Friday, 9 October

JEE Main 2021 · MathsMultiple choiceSingle correctMediumCalculation

JEE Main 18 March 2021, Shift 1, Maths Q78

Question 78 of 90 in this shift, Maths question 18 of 30, Section A.

The equation of one of the straight lines which passes through the point (1, 3) and makes an angle tan⁡−1(2)\tan^{-1}(\sqrt{2}) with the straight line, y+1=32 xy+1=3\sqrt{2}\,x is :
  1. (1)42x+5y−(15+42)=04\sqrt{2}x+5y-(15+4\sqrt{2})=0Official answer
  2. (2)42x−5y−(5+42)=04\sqrt{2}x-5y-(5+4\sqrt{2})=0
  3. (3)52x+4y−(15+42)=05\sqrt{2}x+4y-(15+4\sqrt{2})=0
  4. (4)42x+5y−42=04\sqrt{2}x+5y-4\sqrt{2}=0

Official answer

Option 1

NTA final key.

Chapter
Straight Lines
Topic
No close match in our taxonomy
Idea tested
No close match in our taxonomy

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.