【—】朋友們注意了，初中數(shù)學(xué)中π/2±α及3π/2±α與α的三角函數(shù)值之間的關(guān)系豐富多樣，有需要的朋友們來(lái)看看吧。
π/2±α及3π/2±α與α的三角函數(shù)值之間的關(guān)系
sin(π/2+α)=cosα
cos(π/2+α)=-sinα
tan(π/2+α)=-cotα
cot(π/2+α)=-tanα
sec(π/2+α)=-cscα
csc(π/2+α)=secα
sin(π/2-α)=cosα
cos(π/2-α)=sinα
tan(π/2-α)=cotα
cot(π/2-α)=tanα
sec(π/2-α)=cscα
csc(π/2-α)=secα
sin(3π/2+α)=-cosα
cos(3π/2+α)=sinα
tan(3π/2+α)=-cotα
cot(3π/2+α)=-tanα
sec(3π/2+α)=cscα
csc(3π/2+α)=-secα
sin(3π/2-α)=-cosα
cos(3π/2-α)=-sinα
tan(3π/2-α)=cotα
cot(3&pi 初中地理;/2-α)=tanα
sec(3π/2-α)=-cscα
csc(3π/2-α)=-secα
本文來(lái)自：逍遙右腦記憶 http://www.yy-art.cn/chuzhong/82471.html
相關(guān)閱讀：初中數(shù)學(xué)倒數(shù)的運(yùn)算復(fù)習(xí)題大全