Question

Determinati cos x știind că sin x =1/2

Answer 1

sin x=1/2 ⇒ m(∠x)=30° ⇒cos x=$\frac{ \sqrt{3} }{2}$=0,866

Answer 2

daca sin x = 1/2 => m(< x)=30°  => cos30° = √3 / 2 .