Question

高中数学必修四专题复习题 专题一 两角和与差的正弦,余弦和正切公式

Answer 1

sin(x+y)=sinxcosy+sinycosx
sin(x-y)=sinxcosy-sinycosx
cos(x+y)=cosxcosy-sinxsiny
cos(x-y)=cosxcosy+sinxsiny
tan(x-y)=(tanx-tany)/1+tanxtany
tan(x+y)=(tanx+tany)/1-tanxtany

Answer 2

sin（α±β）＝sinαcosβ±cosαsinβ
cos（α±β）＝cosαcosβ-（+）sinαsinβ
tan（α＋β）＝(tanα＋tanβ)/(1－tanα ·tanβ)
tan（α－β）＝(tanα－tanβ) /(1＋tanα ·tanβ)

Answer 3

sin（α±β）＝sinαcosβ±cosαsinβ
cos（α+β）＝cosαcosβ-sinαsinβ
cos（α-β）＝cosαcosβ+sinαsinβ
tan（α＋β）＝(tanα＋tanβ)/(1－tanα ·tanβ)
tan（α－β）＝(tanα－tanβ) /(1＋tanα ·tanβ)

Answer 4

sin(x+y)=sinxcosy+sinycosx
sin(x-y)=sinxcosy-sinycosx
cos(x+y)=cosxcosy-sinxsiny
cos(x-y)=cosxcosy+sinxsiny
tan(x-y)=(tanx-tany)/1+tanxtany
tan(x+y)=(tanx+tany)/1-tanxtany
就这么多了。楼主不会是书丢了吧