bonsoir
j'aurais besoin d'une petite correction svp!!
soit Q(t) = (1-sin²t)/(2+sint)
je dois calculer :
1)Q(-2+V3)
je trouve :
Q(-2+V3) =(1-(-2+V3)²)/(2-2+V3)
= (1-(4+3-4V3))/(V3) = (1-4-3+4V3)/(V3)= (-6 + 4V3)/V3
=[(-6+4V3)(-V3)]/3
=(6V3 -12)/ 3 = 2V3-4
2)Q(0) = ((1-sin²0)/(2+sin0)
Q(0)= (1)/(2)= 1/2
3)Q(pi/6)= (1 -sin²pi/6)/(2+sinpi/6)
Q(pi/6) = (1- (1/2)²) / (2 + 1/2)=(1-1/4)/(2+1/2)=0.75/2.5=3/10
4)Q(pi/3)= (1-sin²pi/3)/(2+sinpi/3) =(1-(V3/2)²)/(2+V3/2)
= (1-3/4)/(2+V3/2) =(1/4) /(2+V3/2) = 2/(16+4V3)= 1/(8+2V3)
=(8-2V3)/52
5)Q(pi/4) = (1 -(V2/2)²)/(2-V2/2)= (1-2/4)/(2-V2/2) = (1/2)/(2-V2/2)
= 2 / (8-2V2)= 2(8+2V2)/ 56 = (8+2V2)/28
merci
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