f()θ=sin^(2π-θ)+sin(π/2+θ)-3/2+2cos^2(π+θ)+cos(-θ) 求f(π/3)

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f()θ=sin^(2π-θ)+sin(π/2+θ)-3/2+2cos^2(π+θ)+cos(-θ)求f(π/3)f()θ=sin^(2π-θ)+sin(π/2+θ)-3/2+2cos^2(π+θ)+

f()θ=sin^(2π-θ)+sin(π/2+θ)-3/2+2cos^2(π+θ)+cos(-θ) 求f(π/3)
f()θ=sin^(2π-θ)+sin(π/2+θ)-3/2+2cos^2(π+θ)+cos(-θ) 求f(π/3)

f()θ=sin^(2π-θ)+sin(π/2+θ)-3/2+2cos^2(π+θ)+cos(-θ) 求f(π/3)
f(θ)=sin^2(2π-θ)+sin(π/2+θ)-3/2+2cos^2(π+θ)+cos(-θ)
=sin^2θ+cosθ-3/2+2cos^2θ+cosθ
=cos^2θ+2cosθ-1/2
f(π/3)=1/4+√3-1/2=√3-1/4

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