anonymous
  • anonymous
If A is in Quadrant II and cos A= -3/4, find an exact value for sin 2A
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
Recall sin 2A=2sinAcosA. Make your triangle in 2nd quad with Cos A=-3/4 and find sin A
anonymous
  • anonymous
I ended up with a decimal..
anonymous
  • anonymous
Exact value means basically not using a calculator, keeping square root as a number.

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anonymous
  • anonymous
so what did you get for it?
anonymous
  • anonymous
Just put up your work for the problem and we would tell you where you are going wrong.
anonymous
  • anonymous
2(radical 7/4)(-3/4)
anonymous
  • anonymous
The numbers are correct, just cancel, simplify, keeping sq rt 7
anonymous
  • anonymous
so -6 radical 7 over 16?

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