SOLUTION: If y(x) = ln(secx + tanx), determine the third derivative of y(x), i.e., find d^3y/dx^3.

Algebra ->  Equations -> SOLUTION: If y(x) = ln(secx + tanx), determine the third derivative of y(x), i.e., find d^3y/dx^3.       Log On

Use the formulas: , 
  ,
and 

we have:


















Use formula  as 







Edwin