JEE Main 2025April, Unspecified (session-level dataset)MathematicsMediumTrigonometry118× since 2002The number of solutions of the equation cos2θcosθ2+cos5θ2=2cos35θ2\cos 2\theta\cos\frac{\theta}{2} + \cos\frac{5\theta}{2} = 2\cos^3\frac{5\theta}{2}cos2θcos2θ+cos25θ=2cos325θ in [−π2,π2][-\tfrac{\pi}{2},\tfrac{\pi}{2}][−2π,2π] is:AOption A. 7BOption B. 5COption C. 6DOption D. 9CheckSkip · show solution
