JEE Main 20265 Apr, Evening shiftMathematicsMediumTrigonometry118× since 2002If S={θ∈[−π,π]:cosθcos5θ2=cos7θcos7θ2}S=\left\{\theta\in[-\pi,\pi]: \cos\theta\cos\frac{5\theta}{2}=\cos7\theta\cos\frac{7\theta}{2}\right\}S={θ∈[−π,π]:cosθcos25θ=cos7θcos27θ}, then n(S)n(S)n(S) is equal to ______.Your answerType your answer. Integers and decimals are accepted.CheckSkip · show solution
