若 https://assets.asklib.com/psource/201603041717255210.jpg ,则sin2θ=()。

A .https://assets.asklib.com/psource/2016030417172683962.jpg B .https://assets.asklib.com/psource/20160304171728953.jpg C .https://assets.asklib.com/psource/2016030417173049400.jpg D .https://assets.asklib.com/psource/2016030417173214870.jpg

时间:2022-10-25 02:22:14 所属题库:高级中学数学(综合练习)题库

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