Question: please solve these questions 3.Find dy/dx as a function of x. (10%) y = sec(tan x) 4. x = 21' +3 , 1 =f* ,1

please solve these questions

3.Find dy/dx as a function of x. (10%) y = sec(tan x) 4. x = 21' +3 , 1 =f* ,1 = -1.(12%+8%) (a) Find an equation for the line tangent to the curve at the point defined by the given value of t. (b)Find the value of d'y / dx at this point

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