pouvez vous m’aidez svp n-30

coucou
1) ad represente le coté opposé
tan(and)=ad/an
tan 35 degret = ad/12
12*tan(35)=8.40
2) nd represente l'hypo
cos(and)=an/dn
cos35 degret=12/dn
12/cos(35)=14.65
by