JEE Main · Maths · Trigonometric Functions

Product-to-Sum Transformation

JEE Main asked Product-to-Sum Transformation 2 times in 2 of the 108 shifts Lumi analysed, in 2022 and 2026. It belongs to General Solutions, in Trigonometric Functions (Maths). The longest wait between two years asking it was 4 years.

Updated 2026-10-24

Times asked: 2; in 2 shifts
Years: 2 of 8
First asked: 2022; last in 2026
Pattern: Occasional; across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2022 and 2026. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Maths questions.

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 0 in 24 shifts · 2022: 1 in 24 shifts · 2023: 0 in 12 shifts · 2024: 0 in 18 shifts · 2025: 0 in 8 shifts · 2026: 1 in 9 shifts.

Shift by shift

Each square is one analysed shift, in date order. Open a filled one for that paper.

20261 of 9
20250 of 8
20240 of 18
20230 of 12
20221 of 24
20210 of 24
20200 of 12
20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Numerical value is the usual form. Skill tested: multi-step.

Count solutions of trig equation in interval

Difficulty

Easy 0Medium 1Hard 1

1 of the 2 questions had a numerical answer.

Every question

All 2 questions

From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.

Shifts: 24 Jun 2022, Shift 2, 5 Apr 2026, Shift 2.

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