sin² (π+α)-cos(π-α)sin(3/2π + α)+1sin² (π+α)-cos(π-α)sin(3/2π + α)+1的值是A.1 B.-1 C.0 D.2
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sin² (π+α)-cos(π-α)sin(3/2π + α)+1sin² (π+α)-cos(π-α)sin(3/2π + α)+1的值是A.1 B.-1 C.0 D.2
sin² (π+α)-cos(π-α)sin(3/2π + α)+1
sin² (π+α)-cos(π-α)sin(3/2π + α)+1的值是
A.1 B.-1 C.0 D.2
sin² (π+α)-cos(π-α)sin(3/2π + α)+1sin² (π+α)-cos(π-α)sin(3/2π + α)+1的值是A.1 B.-1 C.0 D.2
sin² (π+α)-cos(π-α)sin(3/2π + α)+1
=sin² (α)-cos(α)cos(π + α)+1
=sin² (α)-cos²(α)+1
结果和α相关