cos(23π/4)
来源:学生作业帮助网 编辑:作业帮 时间:2024/10/04 16:04:53
xKN@TeƙWH{'td Bb;p^l-[)OR}}>}tf"r)۸߮@K_"sb(CLa\i/Bna-Z!q;v%d,2(P@JXM%US{/k4`TI]Z(Um.kQƣ5 9[
aA)Ҳ%rrc%?
cos(23π/4)
cos(23π/4)
cos(23π/4)
cos(23π/4)
【紧急求助】计算:cosα+cos(2π/3 +α)+cos(4π/3 +α)
cos(π/11)cos(2π/11)cos(3π/11)cos(4π/11)cos(5π/11)怎么解
cos(x-23π)=
cos(x-23π)=
求值:cos(25π /4)
化简cos(π/9)cos(2π/9)cos(3π/9)cos(4π/9)=( ).请说明理由哦、
计算:cos(π/5)+cos(2π/5)+cos(3π/5)+cos(4π/5)
cos(π/17)*cos(2π/17)*cos(4π/17)*cos(8π/17)
求值:cos(π/11)cos(2π/11)cos(3π/11)cos(4π/11)cos(5π/11)
求值:cos(π/11)-cos(2π/11)+cos(3π/11)-cos(4π/11)+cos(5π/11)
cos(π/11)cos(2π/11)cos(3π/11)cos(4π/11)cos(5π/11)
化简:cos(π/4-a)cos(π/4+a)=?
化简cos(π/4 减a)cos(π/4 加a) 急呀!
若cos(π/4-a)cos(π/4+a)=(根号2 )/6,则cos2a
已知cos阿尔法=3/5,阿尔法属于(-π,0)则cos(π/4-阿尔法)
已知cos(π/2+θ)=1/2,求cos(3π+θ)/cosθ(cos(π+θ)-1) + cos(θ-4π)/cos(θ+2π)cos(3π+θ)+cos(-θ)求值~
已知cos(a+π/3)=1/4,则cos a等于多少?为什么?