Question: 7. Give the exact value of each expression without using a calculator. (a) cos (2 cos-1( (b) sin (cos-1 (2) + tan-1(2) )

7. Give the exact value of each expression without using a

7. Give the exact value of each expression without using a calculator. (a) cos (2 cos-1( (b) sin (cos-1 (2) + tan-1(2) )

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