· 3. use Sum or differmee identity to find the exact value of tan 2400 1 20 _ _ 4. a Or...
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· 3. use Sum or differmee identity to find the exact value of tan 2400 1 20 _ _ 4. a Or difference ide'tity to find the exact value of COS ) 5. Given find cos(2Ð) 13 2 a '3 If