railway RRB JE (CBT I + CBT II) Mock Test 2024 Quantitative Aptitude Trigonometry Circular Measure of Angles

sin θ = \( \frac{{\sqrt 3 }}{2}\), এবং θ একটি সূক্ষ্ম কোণ হলে, cos 3θ-এর মান নির্ণয় করুন।

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