求值:sin(-11π/6)+cos12π/5*tan4π+1/cos7π/3
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求值:sin(-11π/6)+cos12π/5*tan4π+1/cos7π/3
求值:sin(-11π/6)+cos12π/5*tan4π+1/cos7π/3
求值:sin(-11π/6)+cos12π/5*tan4π+1/cos7π/3
求值:sin(-11π/6)+cos12π/5*tan4π+1/cos7π/3
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