Question: 9. Give the exact value of each expression without using a calculator. {a} cos (2 tan-1(2)) 6:5 4 tang = g l 9 J .

9. Give the exact value of each expression without using a calculator. {a} cos (2 tan-1(2)) 6:5 4 tang = g l 9 J . _1 4- _ 3 tan (E) 6' c2=a2+b2=42+32=16+9=25

9. Give the exact value of each expression without using a calculator. {a} cos (2 tan-1(2)) 6:5 4 tang = g l 9 J . _1 4- _ 3 tan (E) 6' c2=a2+b2=42+32=16+9=25

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