Sinh and Skn

**dhiab** · August 29th 2009, 12:33 AM

Solve in R : $\sin x = \sinh (2x - 3) - 1<br />$

**red_dog** · August 29th 2009, 01:34 AM

There is a solution between 2 and 3.

**CaptainBlack** · August 29th 2009, 01:54 AM

Originally Posted by red_dog

There is a solution between 2 and 3.

It is also unique as the derivative of $\sinh(2x-3)-\sin(x)-1$ is always positive.

(root $\approx 2.180$ )

CB

**pacman** · August 29th 2009, 06:24 AM

dhiab, we can rewrite it this way,

.

exponentially,

,

by successive approximation, x = 2.18

dhiab, is this what you need?

Thread: Sinh and Skn