Calculați sin30de grade + cos30de grade - tg45de grade
Va rog !!!


Răspuns :

sin30=1/2
cos30=√3/2
tg45=1
1/2+√3/2-1=√3/2-1
amplificãm pe 1 cu 2=√3-2/2
sin30de grade + cos30de grade - tg45de grade = 1/2 + rad3/2 - 1 = 1 + rad.3 - 2  = rad.3 - 1