计算下列各题.(1)sin230°+cos245°+2sin60°?tan45°;(2)cos230°+cos260°tan60°?cot30°+tan60
计算下列各题.(1)sin230°+cos245°+2sin60°?tan45°;(2)cos230°+cos260°tan60°?cot30°+tan60°;(3)ta...
计算下列各题.(1)sin230°+cos245°+2sin60°?tan45°;(2)cos230°+cos260°tan60°?cot30°+tan60°;(3)tan2°tan4°?tan6°…tan88°.
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