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Posted by on Monday, June 2, 2008 at 9:18pm.

Evaluate giving exact values and identities. Calculator based solutions are not acceptable. Thanks for any help

cos (7pi/12)

  • trig - , Monday, June 2, 2008 at 10:04pm

    7pi/12 radians = 105º = (60-45)º

    Now use the same method I showed you several posts above this one.

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