Question 9 19. Se3z tanh(e3) In cosh(e³²)dz a. 1/6 (In cosh (e"))² +c c. 1/3 (In cosh (e))² +c b. 1/6 (tanh e)2+c d. 1/3 (tanh e")² + c O d

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A: NOTE: Refresh your page if you can't see any equations. . use the formula

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