bidoulrobbieotnikq bidoulrobbieotnikq
  • 11-12-2017
  • Mathematics
contestada

If θ is in Quadrant IV and sinθ = -1/2, then cosθ _____.

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Kalahira
Kalahira Kalahira
  • 25-12-2017
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
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gcantiga44
gcantiga44 gcantiga44
  • 02-07-2020

Clarification:

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

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