计算:sin(-23π/6)+cos13π/7*tan4π-cos13π/3
来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/15 21:56:52
计算:sin(-23π/6)+cos13π/7*tan4π-cos13π/3计算:sin(-23π/6)+cos13π/7*tan4π-cos13π/3计算:sin(-23π/6)+cos13π/7*
计算:sin(-23π/6)+cos13π/7*tan4π-cos13π/3
计算:sin(-23π/6)+cos13π/7*tan4π-cos13π/3
计算:sin(-23π/6)+cos13π/7*tan4π-cos13π/3
利用诱导公式
sin(-23π/6)+cos13π/7*tan4π-cos13π/3
=sin(-23π/6+4π)+cos(13π/7)*tan(4π-4π)-cos(13π/3-4π)
=sin(π/6)+cos(13π/7)*tan0-cos(π/3)
=1/2+0-1/2
=0
计算:sin(-23π/6)+cos13π/7*tan4π-cos13π/3
求值sin(-23/6 π)+cos13/7 πtan4π-cos13/3π
计算sin7π/3cos13π/6+sin(-11π/6)cos(-11π/3)
COS13/6π
三角代数式sin(-23/6∏)+cos13/7∏乘tan3∏-cos13/3∏的值为
计算:cos13π/4+tan(-11π/6)=?
计算:√3sin(-20/3∏)-cos13/4π×tan(-37/4π)
1.化简:(sin450°-α)-sin(180°-α)+cos(450°-α)+cos(180°-α)的值2.化简:sin(-23/6π)+cos13π/7xtan4π-cos13/3π
sin(-4π/3)= cos(-79π/6)= cos13π/6=
sin(-11兀/6)+cos13兀/3×tan4兀
计算不太明白...求值sin(-1320°)*cos1110°+cos(-1020°)sin750°+tan(-405°)求值sin25π/6+cos25π/3+tan25π/4+sin7π/3*cos13π/6-cos5π/3
与cos13π/3的值相同的是 :A.nπ/3 B.sinπ/4 C.sinπ/6
计算sin43.cos13.-cos43.sin13.
求值sin7π/3cos(-23π/6)+tan(-11π/4)cos13π/3
sin13π/6+cos13π/3-tan(-23π/4)=
cos13兀/6
1、sin347 cos148+cos13 cos58等于()2、已知tanα=3,则sinα-2sinαcosα+3cosα等于()3、计算5sin90+2cos0-3tan180+6cos180(要过程)
将下列三角函数转化为锐角三角函数(1)COS13/9π= (2)SIN(1+π)= (3)SIN(-π/5)= (4)COS(-70°6′)=