How do I integrate this function for finding the arch length of a curve?

[Madou]

I'm finding the arch length of a curve:
$$\int_0^b \sqrt{1+sh^2(x/a)} dx$$
How do i integrate this function?

 

[CompuChip]

What do you mean by "count"?
What is "sh"?
If it is the hyperbolic sine: cosh^2 - sinh^2 = 1.

 

[klondike]

I think he meant "evaluate".

What do you mean by "count"?

 

[Madou]

The derivative of sinh is cosh and the derivative of cosh is sinh

 

[Madou]

I think he meant "evaluate".

It's a pity I can't edit the topic.

 

[CompuChip]

The derivative of sinh is cosh and the derivative of cosh is sinh

Exactly. Does this mean you have solved the problem?

 

[Madou]

Does this mean you have solved the problem?

Next step was to use the equation CC gave me.
Thank you, guys.