tan(-17π/8)怎么算

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tan(-17π/8)怎么算tan(-17π/8)怎么算tan(-17π/8)怎么算原式=tan(-2π-π/8)=-tan(π/8)=(1-cosπ/4)/sinπ/4=√2-1tan(-17π/8

tan(-17π/8)怎么算
tan(-17π/8)怎么算

tan(-17π/8)怎么算
原式=tan(-2π-π/8)
=-tan(π/8)
=(1-cosπ/4)/sinπ/4
=√2-1

tan(-17π/8)
=tan(-17π/8 +2π)
=-tan π/8