anonymous
  • anonymous
Find the terminal point P(x, y) on the unit circle determined by t = (4/3)pi
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
you are being asked to find \[(cos(\frac{4\pi}{3}),sin(\frac{4\pi}{3}))\] \[cos(\frac{4\pi}{3})=-\frac{1}{2}\] \[sin(\frac{4\pi}{3})=-\frac{\sqrt{3}}{2}\]
anonymous
  • anonymous
How do I know that those equal those fractions? Im sorry, I understand the unit circle slightly but I use the 30 60 90 and 45 45 90 triangles usually to solve for things. Do those triangles work in this situation as well? And how do I know if they are negative?

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