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What is cos 5π/12 given that and that cos(α + β) = (cos α)(cos β) − (sin α)(sin β)? (Not: You may use the following tables of values.)
  • a)
    1/4
  • b)
    1/2
  • c)
  • d)
  • e)
Correct answer is option 'C'. Can you explain this answer?
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What is cos 5π/12given thatand that cos(α + β) = (cos &a...
The correct answer is c. To find cos 5π/12 using cos(α + β) = (cos α)(cos β) − (sin α)(sin β) given that 5π/12 = you can first substitute π/4 for α and π/6 for β and get  = 
Using the table of values to substitute into that equation,
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What is cos 5π/12given thatand that cos(α + β) = (cos α)(cos β) − (sin α)(sin β)? (Not: You may use the following tables of values.)a)1/4b)1/2c)d)e)Correct answer is option 'C'. Can you explain this answer?
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