www.fltk.net > tAn(A+B)等于多少

tAn(A+B)等于多少

tan(a+b)=-1,a+b=2kπ+3π/4,or a+b=2kπ+7π/4, 若a,b是三角形内角,则a+b=3π/4=135°.

tan(A+B)=tanA+tanB/1-tanAtanB

tan(α+β)=(tanα+tanβ)/(1-tanαtanβ)

sin(A+B) = sinAcosB+cosAsinB cos(A+B) = cosAcosB-sinAsinB tan(A+B) = (tanA+tanB)/(1-tanAtanB) cot(A+B) = (cotAcotB-1)/(cotB+cotA)

tan(a+b)=(tan(a)+tan(b))/(1-tan(a)tan(b))

tan=(tana+tanb)/(1-tana*tanb)

-tanC

tan(α+β)=(tanα+tanβ)/(1-tanα tanβ)tan(α-β)=(tanαtanβ)/(1+tanα tanβ)

tan(a/2+b/2)=(tana/2+tanb/2)/(1-tana/2tanb/2) tan(a/2+b/2)=(sina+sinb)/(cosa+cosb) 分析过程如下:(1)按公式tan(A+B) = (tanA+tanB)/(1-tanAtanB)展开:tan[(a+b)/2]=tan(a/2+b/2)=(tana/2+tanb/2)/(1-tana/2tanb/2) (2)tan(A/2+B/2)=(sinA+

tan(a b)=sin(A B)/COS(A B)=(sinACOSB COSAsinB)/COSACOSB-sinAsinB) =(tan(a)COSB sinB)/(COSB-tan(a)sinB) =(tan(a)/tan(b)-1)/(1/tan(b)-tan(a)) =(tan(a) tan(b))/(1-tan(a)tan(b))

网站地图

All rights reserved Powered by www.fltk.net

copyright ©right 2010-2021。
www.fltk.net内容来自网络,如有侵犯请联系客服。zhit325@qq.com