anonymous
  • anonymous
Rewrite the given expression in terms of the sum or difference of 2 angles. sin(pi/7)cos(pi/2)+cos(pi/7)sin(pi/2) a. cos (pi/7-pi/2) b. cos (pi/7+pi/2) c. sin (pi/7-pi/2) d. sin (pi/7+pi/2)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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DebbieG
  • DebbieG
Do you know the sum and difference identities for sine and cosine?
DebbieG
  • DebbieG
This will help, they are in the 2nd section, "Angle-Sum and -Difference Identities" http://www.purplemath.com/modules/idents.htm
anonymous
  • anonymous
thank you!!

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