Răspuns :
fie AD pependicular pe BC
Fie tr. ADC
ung D=90 grade ==>sinC= AD supra Ac
ung C=60 grade sin 60= radical 3 supra 2
Ac=18 radical 15 ==> sin C= radical 3 supra 2
Fie tr. ADC
ung D=90 grade ==>sinC= AD supra Ac
ung C=60 grade sin 60= radical 3 supra 2
Ac=18 radical 15 ==> sin C= radical 3 supra 2