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【三角函数】两种方法解决三角恒等式的证明取特殊值裂项累加
两种方法解决三角恒等式的证明取特殊值裂项累加
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App06:51![[三角函数]一题多解+活用公式 →提升数学运算素养](http://p3-sign.bdxiguaimg.com/tos-cn-i-0004/be4ffa698dc44757bfe142b2c3acef21~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&biz_tag=list_custom%2Fnone&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=202501210102570B2734F639673560F292&requestFrom=704&version_code=80402&x-expires=1768928577&x-signature=xg9znSgd1h7%2BM%2Ff8uqM6GeoL29I%3D)
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