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sinA<sinB cosA<cosB tanA<tanB sinA<cosA
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sinA=cosA sinA>cosA sinA>tanA sinA<cosA
sinA=cosA sinA>cosA sinA>tanA sinA |
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sinA=cosA sinA>cosA sinA>tanA sinA<cosA
sinA=2sinA′ 2sinA=sinA′ sinA=sinA′ 不确定
sinA=cosA sinA>cosA sinA>tanA sinA<cosA
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cosA<cosB cosA>cosB sinA<cosB sinA>cosB
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