admin百科知識 2022-02-13 3:41:32 用誘導公式求下列三角函數值cos(-17π4)cos(-17π4) sin(-2160°52′) cos(-1751°36′)sin(-26π3)謝過了用誘導公式求下列三角函數值cos(-17π/4)cos(-17π/4)sin(-2160°52′)cos(-1751°36′)sin(-26π/3)謝過了網友廻答:匿名網友cos(-17π/4)=cos(-4π -π/4)=cos(-π/4)=cos(π/4)=(根號2)/2sin(-2160°52′)=sin(-6*360°-52′)=sin(-52′)=-sin(52′)cos(-1751°36′)=cos(-5*360° 48°24′)=cos(48°24′)sin(-26π/3)=sin(-8π - 2π/3)=sin(-2π/3)=-sin(2π/3)=-(根號3)/2 db標簽 生活常識_百科知識_各類知識大全»用誘導公式求下列三角函數值cos(-17π4)cos(-17π4) sin(-2160°52′) cos(-1751°36′)sin(-26π3)謝過了
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