Power series

[johnboy14]

I need the method and solution for the following power series questions

Q1

sigman = at/2 [sinh at + sin at divided by cosh at - cos at]

If a = 1.08 and t = 1.3

calculate sigma correct to 5 significant figures using power series


Q2

Evaluate sinh (1.6), correct to 5 decimal places using power series methods.

[Jenova]

Is this right

Sigma = 0.999

[johnboy14]

Yeah thats right

I need a method though. I have to solve it using power series methods

thanks for the quick reply