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請問如何算成後面的數列?謝謝

na (3) sin :1,0,-1,0,1,0,-1,0,…, 2 當n愈大時,數值不會趨近任何定值,故此數列發散

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n用12345...代入就好
sin(π/2)=1
sin(π)=0
sin(3π/2)=-1
sin(0)=0
k為整數,sin(θ+2kπ)=sin(θ)

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