tanπ/8/(1-tan^2π/8)
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tanπ/8/(1-tan^2π/8)tanπ/8/(1-tan^2π/8)tanπ/8/(1-tan^2π/8)tanπ/8/(1-tan^2π/8)=1/2tanπ/4=1/2
tanπ/8/(1-tan^2π/8)
tanπ/8/(1-tan^2π/8)
tanπ/8/(1-tan^2π/8)
tanπ/8/(1-tan^2π/8)=1/2tanπ/4=1 /2
tanπ/8/(1-tan^2π/8)
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化简:tan(π/8)+1/tan(π/12)
tan(π/8)+1/(tan(π/12))值,要过程
tanπ/8-1/tanπ/8是(tanπ/8)-〔1/(tanπ/8)〕。
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(1-tan^2π/12)/(tanπ/12)化简