求各函数的公式
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最佳答案：cos（61π/12）=cos（π/12)=cos(π/3-π4）=（√2+√6)/4tan(35π/12）=tan(11π/12）=-tan（π/12）=-（
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最佳答案：(1)sin(-17/3π)=sin(-17/3π+6π)=sin(π/3)=√3/2cos(-17/3π)=cos(π/3)=1/2tan(-17/3π)=t
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最佳答案：sin(-7π/12)= -sin(7π/12)= -sin﹙π/3+π/4﹚= -(sinπ/3cosπ/4+cosπ/3sinπ/4)= -(√3/2 *