Given for , find…

MATHEMATICS · Single correct · A Level · Mathematics · Trigonometry · Trigonometry

Problem

Given csc⁡α=53\csc \alpha = \dfrac{5}{3} for 0∘<α<90∘0^{\circ} < \alpha < 90^{\circ}, find cot⁡2α\cot^2 \alpha. (a) 259\dfrac{25}{9} (b) 169\dfrac{16}{9} (c) 349\dfrac{34}{9} (d) 916\dfrac{9}{16}

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