anonymous
  • anonymous
anyone know the answer to this precalculus question?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
anonymous
  • anonymous
hi igbasallote
anonymous
  • anonymous
You need to look up the known values for the sin and cos function at pi/6 and pi/3. Then, remember that the values are kind of similar, but with signs changed in various ways, when you do things like add pi/2, pi, 3pi/2 etc... draw the unit circle and draw in different angles to remember how that is calculated...

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anonymous
  • anonymous
|dw:1332902858749:dw| See that here sin(pi/6) = sin(5pi/6).... Do something similar for the different parts of your question...
anonymous
  • anonymous
For example, notice that for the first question, sin(13pi/6) is the same as sin(2pi + pi/6) ... You should be able to work that out.

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