cos^2a- sin^2a上述式子怎么化成1-tan^2a/1+tan^2a
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cos^2a- sin^2a上述式子怎么化成1-tan^2a/1+tan^2a
cos^2a- sin^2a
上述式子怎么化成1-tan^2a/1+tan^2a
cos^2a- sin^2a上述式子怎么化成1-tan^2a/1+tan^2a
分类到数学应该会容易得到答案,你发到动漫区了
cos^2a- sin^2a上述式子怎么化成1-tan^2a/1+tan^2a
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