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Please solve the following 2 functions according to the information given and show all the steps Plz

4. Let f(:1) = (cos x) (a) Find f(:1) (b) Find equation of the tangent line at (27,1). (c) Find the linear approximation of

3. Given the function y sin 2.x = x cos 2y. (a) Find y. (b) Find equation of the tangent line at (2, 1). (c) Find equation o

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