am nevoie de toate ex va rog frumos urgent!!!!

Răspuns:
a)
sin30=1/2
tg45=1
cos30=rad3/2
ctg60=rad3/3
1/2 + 1/2 = 1
b)
sin60=rad3/2
cos60=1/2
sin30=1/2
cos30=rad3/2
sin45=cos45=rad2/2
rad3/4 + rad3/4 - 1/2 = (rad3-1)/2