Réponses

Meilleure réponse !
2012-05-16T20:09:36+02:00

Tu regardes ton cercles trigo, et tu apprends tes formules ^^

cos (-π/3) = cos(π/3) = 1/2

sin (-π/3) = -sin(π/3) = -√3/2

cos (3π/4) = -√2/2

sin (3π/4) = √2/2

cos (7π/6) = -√3/2

sin (7π/6) = -1/2

 

FIN