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Friday, 9 October

JEE Main Maths · Trigonometric Functions

Cosine Product Identity with 60 Degrees

Cosine Product Identity with 60 Degrees (Trigonometric Functions) was asked once in the 42 JEE Main shifts Lumi analysed, in 2024.

Times asked
1
in 1 shift
Years
2024
Usual format
Single correct
Multi-step
Pattern
New since 2024
asked once so far

How it is asked

  • Sum of angles where triple-angle cosine is maximum

Difficulty

Easy 0Medium 1Hard 0

Where it sits

Chapter: Trigonometric Functions. Topic: Trigonometric Identities, 14 questions over 12 ideas.

Other repeat ideas in this topic

Every time it came

The question

Newest first, each with its options and official answer.

  1. 9 Apr 2024, Shift 1 · Q20Let ∣cos⁡θcos⁡(60∘−θ)cos⁡(60∘+θ)∣≤18\left|\cos\theta\cos(60^\circ-\theta)\cos(60^\circ+\theta)\right|\le\frac{1}{8}, θ∈[0,2π]\theta\in[0,2\pi]. Then, the sum of all…MediumSingle correct