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题型:填空题 题类:常考题 难易度:普通
三角函数的化简求值++7
解:∵sin(2π﹣α)=,cos(π+α)=,
cos ( +α)=,cos ( ﹣α)=,
cos(π﹣α)=,sin(3π+α)=,
sin(﹣π﹣α)=,sin ( +α)=,
∴原式=.
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