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Saturday, 31 October

JEE Main 2022 · MathsNumerical answerNumerical valueHardCalculation

JEE Main 26 June 2022, Shift 1, Maths Q28

Question 28 of 90 in this shift, Maths question 28 of 30, Section B.

The value of the integral 48π4∫0π(3πx22−x3)sin⁡x1+cos⁡2x dx\frac{48}{\pi^4}\int_0^{\pi}\left(\frac{3\pi x^2}{2} - x^3\right)\frac{\sin x}{1 + \cos^2 x}\,dx is equal to ________.

Official answer

6

NTA final key.

Chapter
Integrals
Idea tested
King's Property

Same idea in other shifts

Asked 18× in all
  1. 3 Apr 2025, Shift 2 · Q18The integral ∫0π8x dx4cos⁡2x+sin⁡2x\int_0^{\pi} \frac{8x\,dx}{4\cos^2 x + \sin^2 x} is equal toMediumSingle correct
  2. 8 Apr 2025, Shift 2 · Q18Let f(x)f(x) be a positive function and I1=∫−1212x f(2x(1−2x)) dxI_1 = \int_{-\frac{1}{2}}^{1} 2x\, f\big(2x(1-2x)\big)\,dx and…HardSingle correct
  3. 4 Apr 2024, Shift 1 · Q25If ∫0π/4sin⁡2x1+sin⁡xcos⁡xdx=1alog⁡e(a3)+πb3\int_0^{\pi/4}\frac{\sin^2x}{1+\sin x\cos x}dx=\frac{1}{a}\log_e\left(\frac{a}{3}\right)+\frac{\pi}{b\sqrt{3}}, where…HardNumerical value
  4. 5 Apr 2024, Shift 1 · Q10The value of ∫−ππ2y(1+sin⁡y)1+cos⁡2y dy\int_{-\pi}^{\pi}\frac{2y(1+\sin y)}{1+\cos^2 y}\,dy is :MediumSingle correct
  5. 5 Apr 2024, Shift 2 · Q25If f(t)=∫0π2x dx1−cos⁡2tsin⁡2xf(t) = \int_0^{\pi} \frac{2x\,dx}{1-\cos^2 t \sin^2 x}, 0<t<π0 < t < \pi, then the value of…HardNumerical value
  6. 1 Feb 2024, Shift 1 · Q10The value of the intergral ∫0π/4x dxsin⁡4(2x)+cos⁡4(2x)\int_0^{\pi/4}\frac{x\,dx}{\sin^4(2x)+\cos^4(2x)} equals :HardSingle correct
  7. 1 Feb 2024, Shift 2 · Q11The value of ∫−01(2x3−3x2−x+1)13 dx\int_{-0}^{1}(2x^3-3x^2-x+1)^{\frac{1}{3}}\,dx is equal to :MediumSingle correct
  8. 27 Jan 2024, Shift 1 · Q12If (a,b)(a, b) be the orthocentre of the triangle whose vertices are (1,2)(1, 2), (2,3)(2, 3) and (3,1)(3, 1), and I1=∫abxsin⁡(4x−x2) dxI_1=\int_a^b x\sin(4x-x^2)\,dx,…HardSingle 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 108 of the 174 JEE Main shifts held from 2017 to 2026.