设f(θ)=2cos³-sin²(θ+π)-2cos(-θ-π)+1/2+2cos²(7π+θ)+cos(-θ),求f(π/3)

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设f(θ)=2cos³-sin²(θ+π)-2cos(-θ-π)+1/2+2cos²(7π+θ)+cos(-θ),求f(π/3)
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设f(θ)=2cos³-sin²(θ+π)-2cos(-θ-π)+1/2+2cos²(7π+θ)+cos(-θ),求f(π/3)
设f(θ)=2cos³-sin²(θ+π)-2cos(-θ-π)+1/2+2cos²(7π+θ)+cos(-θ),求f(π/3)

设f(θ)=2cos³-sin²(θ+π)-2cos(-θ-π)+1/2+2cos²(7π+θ)+cos(-θ),求f(π/3)



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