For an acute angle , .

MATHEMATICS · Multi-part · A Level · Mathematics · Trigonometry · Trigonometry

Problem

For an acute angle α\alpha, tan⁡(90∘−α)=47\tan(90^\circ - \alpha)=\dfrac{4}{7}. (i) Find cot⁡α\cot \alpha. (ii) Hence determine sin⁡α\sin \alpha in simplest radical form.

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