sin﹙π﹢6)=cos(?)
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sin﹙π﹢6)=cos(?)sin﹙π﹢6)=cos(?)sin﹙π﹢6)=cos(?)由于sin(x)=cos(x-π)所以sin﹙π﹢6)=cos(6)sin﹙π/6)=cos(π/3)
sin﹙π﹢6)=cos(?)
sin﹙π﹢6)=cos(?)
sin﹙π﹢6)=cos(?)
由于sin(x)=cos(x-π)
所以sin﹙π﹢6)=cos(6)
sin﹙π/6)=cos(π/3)
sin﹙π﹢6)=cos(?)
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