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(a).

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The function is $\"\"$ .

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Definition of hyperbolic trigonometry : $\"\"$ .

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If $\"\"$ then $\"\"$ .

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$\"\"$ .

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(b).

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The function is $\"\"$ .

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Definition of hyperbolic trigonometry : $\"\"$

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$\"\"$

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If $\"\"$ then $\"\"$ .

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$\"\"$

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$\"\"$ .

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$\"\"$ .

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(c).

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The function is $\"\"$ .

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The definition of hyperbolic trigonometry : $\"\"$ .

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$\"\"$

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If $\"\"$ then $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$ .

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$\"\"$ .

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(d).

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The function is $\"\"$ .

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The definition of hyperbolic trigonometry : $\"\"$ .

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$\"\"$

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If $\"\"$ then $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$ .

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$\"\"$ .

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$\"\"$

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(e).

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The function is $\"\"$ .

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The definition of hyperbolic trigonometry : $\"\"$ .

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$\"\"$

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If $\"\"$ then $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ .

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(f).

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The function is $\"\"$ .

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Definition of hyperbolic trigonometry : $\"\"$ .

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$\"\"$

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If $\"\"$ then $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$ .

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$\"\"$ .

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(g).

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The function is $\"\"$ .

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Definition of hyperbolic trigonometry : $\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ .

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$\"\"$ .

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(h).

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The function is $\"\"$ .

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Definition of hyperbolic trigonometry : $\"\"$

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$\"\"$

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$\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$ .

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$\"\"$ .

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$\"\"$

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(i).

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The function is $\"\"$ .

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The definition of hyperbolic trigonometry : $\"\"$ .

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$\"\"$ .

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If $\"\"$ then $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$ .

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$\"\"$ .

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(a). $\"\"$ .

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(b). $\"\"$ .

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(c). $\"\"$ .

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(d). $\"\"$ .

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(e). $\"\"$ .

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(f). $\"\"$ .

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(g). $\"\"$ .

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(h). $\"\"$ .

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(i). $\"\"$ .