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ICSE Class X Math 2016 Paper

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Question : 6 of 57
Marks: +1, -0
Without using trigonometrical tables, evaluate :
csc⁡257∘−tan⁡233∘+cos⁡44∘csc⁡46∘\csc^2 57^{\circ} - \tan^2 33^{\circ} + \cos 44^{\circ} \csc 46^{\circ} −2cos⁡45∘−tan⁡260∘-\sqrt{2}\cos 45^{\circ} - \tan^2 60^{\circ}.
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