**TI82** TxtView file generated by CalcText - Kouri Trigo˙TrigonométrieAngles deg/rad: 30=π/6 45=π/4 60=π/3 90=π/2 120=2π/3 135=3π/4 150=5π/6 180=π 210=7π/6 225=5π/4 240=4π/3 270=3π/2 300=5π/3 315=7π/4 330=11π/6 360=2π Angles associés: Opposés: cos(-x)=cos(x) sin(-x)=-sin(x) Complementaires: cos(π/2-x)=sin(x) sin(π/2-x)=cos(x) Supplementaires: cos(π-x)=-cos(x) sin(π-x)=sin(x) Autres: cos(π+x)=-cos(x) sin(π+x)=-sin(x) cos(π/2+x)=-sin(x) sin(π/2+x)=cos(x) Formules d'addition: cos(a+b)=cos(a)cos(b)-sin(a)sin(b) sin(a+b)=sin(a)cos(b)+sin(b)cos(a) cos(a-b)=cos(a)cos(b)-sin(a)sin(b) sin(a-b)=sin(a)cos(b)-sin(b)cos(a) Formules de duplication: cos2a=cos˛a-sin˛a =1-2sin˛a =2cos˛a-1 sin2a=2sin(a)cos(a) Angles particuliers: Cosinus: 0=1 π/6=√3/2 π/4=√2/2 π/3=1/2 π/2=0 Sinus: 0=0 π/6=1/2 π/4=√2/2 π/3=√3/2 π/2=1˙^