Question
cosec 2910° +sec 4260°+tan 2565° +cot 2115°
=?Solution
cosec (360°×8+30°) +sec (360°×12-60°) +tan (360°×7+45°) +cot (360°×6-45°) =cosec 30° +sec 60° +tan45°-cot45° =2+2+1-1 =4.
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