MCQ · ঢাকা বিশ্ববিদ্যালয় ভর্তি পরীক্ষা · ২০২২
tanθ + cotθ = 2cosecθ, 0 ≤ θ < π/2 হলে, θ-এর মান কত?
- কπ/4
- খ5π/3
- গπ/6
- ঘπ/3
সঠিক উত্তর: ঘ) π/3
ব্যাখ্যা
1/(sinθcosθ) = 2/sinθ ⇒ cosθ = 1/2 ⇒ θ = π/3।
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