发布网友 发布时间:2022-04-24 09:29
共2个回答
热心网友 时间:2023-10-09 11:01
(sin x)∧2+(cos x)∧2=1,sin 2x=2sin xcos x,cos 2x=1-2(sin x)∧2=2(cos x)∧2-1,(sec x)∧2+(cos x)∧2=1,(csc x)∧2+(sin x)∧2=1,(sec x)∧2-(tan x)∧2=1,(csc x)∧2-(cot x)∧2=1,sin (x+y)=sin xcos y+cos xsin y,cos(x+y)=cos xcos y-sin xsin y.热心网友 时间:2023-10-09 11:02
比如行位20度 分型面还有0.5我就就这算tan20乘以0.5就可以磨行位斜度了