数学同角三角比的化简1.(sin(π+α)-tan(-α)-tan(π+α))/(tan(α-π)+cos(-α)+cos(π+α))

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数学同角三角比的化简1.(sin(π+α)-tan(-α)-tan(π+α))/(tan(α-π)+cos(-α)+cos(π+α))数学同角三角比的化简1.(sin(π+α)-tan(-α)-tan

数学同角三角比的化简1.(sin(π+α)-tan(-α)-tan(π+α))/(tan(α-π)+cos(-α)+cos(π+α))
数学同角三角比的化简
1.(sin(π+α)-tan(-α)-tan(π+α))/(tan(α-π)+cos(-α)+cos(π+α))

数学同角三角比的化简1.(sin(π+α)-tan(-α)-tan(π+α))/(tan(α-π)+cos(-α)+cos(π+α))
化简为-sina+tana-tana/tana+cosa-cosa
得-cosa