Question

Gasiti masura u a unui unghi in fiecare caz: a)sin u° =√3/2 b) sin 2u°=√3/2 c)cos u=1/2 d)cos u/2=√3/2 e)tg u/3=2/√3 f)tg u= 1

Answer 1

a) sin u = √3/2 ⇒ u=60°

b) sin 2u = √3/2 ⇒ 2u=60° ⇒ u=60°/2 ⇒ u=30°

c) cos u = 1/2 ⇒ u=60°

d) cos u/2 = √3/2 ⇒ u/2=30° ⇒ u=2*30° ⇒ u=60°

e) tg u/3 = 2/√3 = 2*√3/3 (aici cred ca este o greseala)

f) tg u = 1 ⇒ u=45°