sinθ+cosθ=1/5,θ∈(0,π),求tan2θ
设tan2θ =-2根号2,2θ∈(π/2,π)求(2cos^2θ-2-sinθ-1)/(sinθ+cosθ)
已知tan2θ=3/4(π/2<θ<π),求(2cos² ×θ/2+sinθ-1)/√2cos(θ+π/4)的
已知tan2θ=-2根号2,π<2θ<2π.求(2cos²θ/2-sinθ-1)/[根号2sin(π
已知tan2θ=-2根号2,π/4<θ<π/2.求(2cos²θ/2-sinθ-1)/[根号2sin(π/4+
已知tan2θ=3/4(π/2<θ<π),求(2cos^2θ/2+sinθ+10/[√2cos(θ+π/4]
设θ∈(0,派)若sin(θ+7派/4)+cos(θ-3派/4)=根号5/2..则tan2θ等于多少
设向量a(cosθ,sinθ),b(√3,1)1.当a⊥b,求tan2θ 2.求|a+b|的最大值
(sinθ+cosθ-1)(sinθ-cosθ+1)/sin2θ=tan2/θ
已知tan2θ=-2根号2,π〈2θ〈2π,求(2cos^2θ/2-sinθ-1)/(根号2sin(θ+9π/4))
已知向量a=(sinθ,-2),b=(1,cosθ),若|a+b|=√6,求tan2θ的值 若a⊥b,且θ∈锐角,求si
tanθ=a,求[sin(pi/4+θ)/sin(pi/2-θ)]*tan2θ
tanθ=a,求[sin(pi/4+θ)/sin(pi/2-θ)]*tan2θ,