Learn

Friday, 9 October

JEE Main 2021 · MathsMultiple choiceSingle correctMediumApplication

JEE Main 25 July 2021, Shift 1, Maths Q78

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

The value of the definite integral ∫π/245π/24dx1+tan⁡2x3\int_{\pi/24}^{5\pi/24}\frac{dx}{1+\sqrt[3]{\tan2x}} is :
  1. (1)π18\frac{\pi}{18}
  2. (2)π3\frac{\pi}{3}
  3. (3)π12\frac{\pi}{12}Official answer
  4. (4)π6\frac{\pi}{6}

Official answer

Option 3

NTA final key.

Chapter
Integrals
  1. 2 Apr 2026, Shift 1 · Q19Let [⋅][\cdot] denote the greatest integer function. Then the value of ∫03(ex+e−x[x]!)dx\int_0^3\left(\frac{e^x+e^{-x}}{[x]!}\right)dx is :MediumSingle correct
  2. 2 Apr 2026, Shift 1 · Q25If α=∫023log⁡2(x2+4)dx+∫242x−4 dx\alpha=\int_0^{2\sqrt3}\log_2\left(x^2+4\right)dx+\int_2^4\sqrt{2^x-4}\,dx, then α2\alpha^2 is equal to __________.HardNumerical value
  3. 2 Apr 2026, Shift 2 · Q17The value of ∫020π(sin⁡4x+cos⁡4x)dx\int_0^{20\pi} (\sin^4 x + \cos^4 x)dx is equal to:EasySingle correct
  4. 4 Apr 2026, Shift 1 · Q19Let ∫−22(∣sin⁡x∣+[xsin⁡x])dx=2(3−cos⁡2)+β\int_{-2}^{2}\left(|\sin x|+[x\sin x]\right)dx=2(3-\cos 2)+\beta, where [⋅][\cdot] is the greatest integer function. Then…HardSingle correct
  5. 5 Apr 2026, Shift 1 · Q18The value of the integral ∫0∞log⁡e(x)x2+4 dx\int_0^{\infty} \frac{\log_e(x)}{x^2+4}\,dx is:HardSingle correct
  6. 6 Apr 2026, Shift 1 · Q18The value of the integral ∫−π4π4(32cos⁡4x1+esin⁡x)dx\int_{-\frac{\pi}{4}}^{\frac{\pi}{4}}\left(\frac{32\cos^4 x}{1+e^{\sin x}}\right)dx is:MediumSingle correct

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.