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簡(jiǎn)介： 正切函數(shù)是直角三角形中對(duì)邊與鄰邊的比值叫做正切放在直角坐標(biāo)系中即tanθ=y/xtanA=∠A的對(duì)邊/∠對(duì)邊的鄰邊在直角坐標(biāo)系中相當(dāng)于直線的斜率k 更多>

正切函數(shù)是直角三角形中對(duì)邊與鄰邊的比值叫做正切放在直角坐標(biāo)系中即tanθ=y/xtanA=∠A的對(duì)邊/∠對(duì)邊的鄰邊在直角坐標(biāo)系中相當(dāng)于直線的斜率k