Log ind
Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 7 - No. 20)
If cos θ = -0.5, and θ is between 0 and 180 degrees, what is the value of θ?
30°
60°
120°
150°
Forklaring
cos(120°) = -0.5
Kommentarer (0)
Log ind for at kommentere
Reklame
Tillad, at javascript indlæser denne side korrekt
