已知函数f(x)=4sin(π-x)cos(x-2π)若θ∈(0,π) f(θ+π/4)=2/3 求sinθ
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![已知函数f(x)=4sin(π-x)cos(x-2π)若θ∈(0,π) f(θ+π/4)=2/3 求sinθ](/uploads/image/z/5118413-5-3.jpg?t=%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0f%28x%29%3D4sin%28%CF%80-x%29cos%28x-2%CF%80%29%E8%8B%A5%CE%B8%E2%88%88%280%2C%CF%80%29+f%28%CE%B8%2B%CF%80%2F4%29%3D2%2F3+%E6%B1%82sin%CE%B8)
已知函数f(x)=4sin(π-x)cos(x-2π)若θ∈(0,π) f(θ+π/4)=2/3 求sinθ
已知函数f(x)=4sin(π-x)cos(x-2π)
若θ∈(0,π) f(θ+π/4)=2/3 求sinθ
已知函数f(x)=4sin(π-x)cos(x-2π)若θ∈(0,π) f(θ+π/4)=2/3 求sinθ
f(θ+π/4)=4sin(π-(θ+π/4))cos((θ+π/4)-2π)=2/3