JEE Main 2019 — Differentiation Question with Solution
From: JEE Main 2019 (Online) 9th January Evening Slot
Question
If x 3 tan t and y 3 sec t, then the value of at t is :
Choose an option
Show full solutionCorrect option: B
Correct answer
B
Step-by-step explanation
x = 3 tan t and y = 3 sec t
So that = 3sec2t and = 3 sec t tan t
= = sin t
= (cos t)
= (cos3 t)
=
So that = 3sec2t and = 3 sec t tan t
= = sin t
= (cos t)
= (cos3 t)
=
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This is a previous-year question from JEE Main 2019, covering the Differentiation 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.