1、高中全部函數公式大全三角函數公式兩角和公式sin(A+B)=sinAcosB+cosAsinBsin(A-B)=sinAcosB-cosAsinB?cos(A+B)=cosAcosB-sinAsinBcos(A-B)=cosAcosB+sinAsinBtan(A+B)=(tanA+tanB)/(1-tanAtanB)tan(A-B)=(tanA-tanB)/(1+tanAtanB)cot(A+B)=(cotAcotB-1)/(cotB+cotA)?cot(A-B)=(cotAcotB+1)/(cotB-cotA)倍角公式tan2A=2tanA/(1-tanA2A)Sin2A=2SinA?Cos

2、ACos2A=CosA2A-SinA2A=2CosA2A-1=12sinA2A三倍角公式sin3A=3sinA-4(sinA)A3；cos3A=4(cosA)A3-3cosAtan3a=tana?tan(3+a)?jtan(3-a)/半角公式,.sin(A/2)=-3$A)0cos(A=V(1+C0sA)/tan(A/2)=-CSA)/(1+cosA)cot2)="(1+co-COSA)?tan(A/2)=(1-cosA)/sinA=sinA/(1+cosA)和差化積sin(a)+sin(b)=2sin(a+b)2cos(a-b)/2sin(a)-sin(b)=2cos(a+b)2s

3、in(a-b)/2cos(a)+cos(b)=2cos(a+b21cos(a-b)/2cos(a)-cos(b)=-2sin(a+b)Zsin(a-b)/2tanA+tanB=sin(A+B)/cosAcosB積化和差sin(a)sin(b)=-/2*cos(a+b)-cos(a-b)cos(a)cos(b)=/2*cos(a+b)+cos(a-b)sin(a)cos(b)=屹*sin(a+b)+sin(a-b)cos(a)sin(b)=屹*sin(a+b)-sin(a-b)誘導公式sin(-a)=-sin(a)cos(-a)=cos(a)sin(兀-02=cos(a)cos(兀-母=sin(

4、a)sin(/2+a)=cos(a)cos(兀/2+a-s=n(a)sin(-a)=sin(a)cos(-a)=-cos(a)sin(兀+a)sin(a)cos(兀+a>cos(a)tgA=tanA=sinA/cosA萬能公式sin(a)=2tan(a2)/1+tan(a/2)八2cos(a)=1-tan(a2)八2/1+tan(a/2)八2tan(a)=2tan(a/2)/1-tan(a/2)八2其它公式a?sin(a)+b?cos(a)=V(aA2+bA2)*fsin(a+c)tan(c)=b/aa?sin(a>b?cos(a)=V(aA2+bA2)*coS區中，tan(c)=a/b1+sin(a)=sin(a2)+cos(a2)F2;1-sin(a)=sin(a2)-cos(a/2)A2;其他非重點三角函數csc(a)=1sin(a)sec(a)=/Cos(