Respuesta :

Kalahira
Solution : Quadrant IV ranges from 270 deg to 360 deg Also sinθ = - value & cosθ= + value in IV quadrant Here, sinθ = -1/2, we know sin30=1/2 this gives, θ = 330deg as sinθ = sin(360-θ) Hence, cosθ=cos330=cos(360-30)=cos30 Answer: cos30 = âš3/2
gcantiga44

Clarification:

The answer is [tex]\frac{\sqrt{3} }{2}[/tex] (√3/2)