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UKMT Senior Mathematical Challenge, 2009

Algebra Difficulty 1.0 Junior Find the answer United Kingdom

Which of the following has the greatest value?

(A) cos⁡50∘\cos 50^\circ (B) sin⁡50∘\sin 50^\circ (C) tan⁡50∘\tan 50^\circ (D) 1sin⁡50∘\frac{1}{\sin 50^\circ} (E) 1cos⁡50∘\frac{1}{\cos 50^\circ}

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