若cos(5π/12+θ)=1/7,则sin(π/12-θ)
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若cos(5π/12+θ)=1/7,则sin(π/12-θ)
若cos(5π/12+θ)=1/7,则sin(π/12-θ)
若cos(5π/12+θ)=1/7,则sin(π/12-θ)
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若cos(5π/12+θ)=1/7,则sin(π/12-θ)
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