求值sin7π/3cos(-23π/6)+tan(-11π/4)cos13π/3
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求值sin7π/3cos(-23π/6)+tan(-11π/4)cos13π/3求值sin7π/3cos(-23π/6)+tan(-11π/4)cos13π/3求值sin7π/3cos(-23π/6)
求值sin7π/3cos(-23π/6)+tan(-11π/4)cos13π/3
求值sin7π/3cos(-23π/6)+tan(-11π/4)cos13π/3
求值sin7π/3cos(-23π/6)+tan(-11π/4)cos13π/3
=sinπ/3cos(π/6)+tan(π/4)cos(π/3)
=0/3cos(π/6)+1*(1/2)
=1/2
求值sin7π/3cos(-23π/6)+tan(-11π/4)cos13π/3
sin7/3pi×cos(-11/6pi)+tan(-15/4pi)求值
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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
确定下列函数值的符号(1)sin7.6π (2)tan(-23/4π)(3)cos(-59/17π)要有详解.
sin7.6π,tan(-23/4π),cos(-59/17π)的三角函数价值符号,要具体过程,
计算sin7π/3cos13π/6+sin(-11π/6)cos(-11π/3)
求arcsin(sin7/6π)=
sin7/12π=?
sin7/12π=
sin-3π/4= cos11π/6= tan13π/4= sin7π/2= cos-3π/2= sin10π/3=
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