已知θ∈(0,π/2),且满足关系logtanθCOSθ=3/2 求logcsc^2θ(sinθ*cosθ)的值.

问题描述:

已知θ∈(0,π/2),且满足关系logtanθCOSθ=3/2 求logcsc^2θ(sinθ*cosθ)的值.
答案是-7/10,要详细过程
明天要交作业,各位帮帮忙啊!晚上10点来拿

logtanθCOSθ=1/logCOSθ tanθ=1/logCOSθ (sinθ/cosθ)=1/[logCOSθ (sinθ)-logCOSθ (cosθ)]=1/[logCOSθ (sinθ)-1]=3/2,∴logCOSθ (sinθ)=5/3;∴logsinθ (COSθ)=3/5;则logcsc^2θ(sinθ*cosθ)=(1/2)lo...