求值:sin^2 120+cos 180+tan 45—cos^2(-330)+sin(-210)
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求值:sin^2120+cos180+tan45—cos^2(-330)+sin(-210)求值:sin^2120+cos180+tan45—cos^2(-330)+sin(-210)求值:sin^2
求值:sin^2 120+cos 180+tan 45—cos^2(-330)+sin(-210)
求值:sin^2 120+cos 180+tan 45—cos^2(-330)+sin(-210)
求值:sin^2 120+cos 180+tan 45—cos^2(-330)+sin(-210)
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求值:sin^2 120+cos 180+tan 45—cos^2(-330)+sin(-210)
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