化简sin(θ-5π)cos(π/2+θ)cos(4π-θ)/cos(3π-θ)sin(θ-3π)sin(-θ-4π)

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化简sin(θ-5π)cos(π/2+θ)cos(4π-θ)/cos(3π-θ)sin(θ-3π)sin(-θ-4π)化简sin(θ-5π)cos(π/2+θ)cos(4π-θ)/cos(3π-θ)s

化简sin(θ-5π)cos(π/2+θ)cos(4π-θ)/cos(3π-θ)sin(θ-3π)sin(-θ-4π)
化简sin(θ-5π)cos(π/2+θ)cos(4π-θ)/cos(3π-θ)sin(θ-3π)sin(-θ-4π)

化简sin(θ-5π)cos(π/2+θ)cos(4π-θ)/cos(3π-θ)sin(θ-3π)sin(-θ-4π)
原式=-sin(θ)*(-1)sin(θ)cos(θ)/-cos(θ)*(-1)sin(θ)*(-1)sin(θ)=-1

sin(π-θ)+cos(2π-θ)/cos(5π/2-θ)+sin(3π/2+θ)=2,则sinθcosθ=______ 若(sinθ+cosθ)/(sinθ-cosθ)=2,则sin(θ-5π)*sin(3π/2-θ)等于? 化简sin(π+a)cos(π-a)tana/cos(π/2+a)sina 求值,若sinθ+2cosθ=0.求3sinθ-2cosθ/2cosθ-...化简sin(π+a)cos(π-a)tana/cos(π/2+a)sina求值,若sinθ+2cosθ=0.求3sinθ-2cosθ/2cosθ-sinθ的值要详细的过程在线 若sin(θ-π)=2cos(2π-θ)求(1)sinθ+5cosθ/sinθ-3cosθ (2)sinθcosθ的值 若[sin(π-θ)+cos(2π-θ)]/[cos(5π/2-θ)+sin(3π/2+θ)]=2,求sinθ*cosθ的值若[sin(π-θ)+cos(2π-θ)]/[cos(5π/2-θ)+sin(3π/2+θ)]=2,求sinθ*cosθ的值 三角函数求解!难题我采纳!10.化简.(1)【sin(2π-α)cos([π/2]+α)cos([π/2]-α)】/【sin(3π-α)sin(-π-α)sin([π/2]+α)】(2)【an(2π-θ)sin(2π-θ)cos(6π-θ)】/【(-cosθ)sin(5π+θ)】11.已知tanα=-2,求sin^2α-4sinαcos 化简sin(θ-5π)cos(π/2+θ)cos(4π-θ)/cos(3π-θ)sin(θ-3π)sin(-θ-4π) θ∈(0,π/2),比较cosθ、sin(cosθ)、cos(sinθ)的大小 求值:(tan10°-√3)×cos10°/sin50° 求证:[sin(2α+β)]/sinα- 2cos(α+β)=sinβ/cosα 化简cosθ+cos(θ+2π/3)+cos(θ+4π/3) 证明:sin(α+β)sin(α-β)=sin^2α-sin^2β 1、化简 (tan2π-θ)sin(-2π-θ)cos(6π-θ)/cos(θ-π)sin(5π+θ)2、化简 sin(15π/2+α)cos(α-π/2)/sin(9π/2-α)cos(3π/2+α) 3、求证 sin(π/2+θ)-cos(π-θ)/sin(π/2-θ)-sin(π-θ)=2 化简:[(1+sinθ+cosθ)(sinθ/2-cosθ/2)]/√(2+2cosθ)(0<θ<π)=[2sin(θ/2)cos(θ/2)+2cos²(θ/2)](sinθ/2-cosθ/2)=2cos(θ/2)(sinθ/2+cosθ/2)(sinθ/2-cosθ/2)我分子已经算到这儿了 而且分母不会化简 已知tanθ=(sin α-cos α)/(sin α+cos α) a,θ(0,π/2) 求证cos(3/2兀+ α) -sin(5π/2-α)=根号2sin(θ-4π) 求值:已知sinθ+cosθ=1/5,已知θ∈(0,π).求(1)sinθ*cosθ(2)sinθ-cosθ(3)tanθ 已知2sin(3π+θ)=cos(π+θ),求2sin²θ+3sinθcosθ-cos²θ的值. 化简:1+sinθ+cosθ+2sinθcosθ /1+sinθ+cosθ 怎样用matlab解三角函数cos(π/2*cosθ)/sin(θ)=0.707?是cos((π/2)*cosθ)/sin(θ)=0.707 (sinθ+cosθ)/(sinθ-cosθ)=2,则sin(θ-5π)*sin(3π/2-θ)= cosθ=-3/5,角θ在(π/2,π)求2/cos(π/2-θ)+2cos(π-θ)sin(13/6π)/sinθ的值,cosθ=-3/5,角θ在(π/2,π)求2/cos(π/2-θ)+2cos(π-θ)sin(13/6π)/sinθ的值