Previous page : Hyperbolic functions – The cosinus hyperbolicus and its inverse
The graph of this is seen below.
We can compare this with the exponential form of the sine function found here.
The inverse function
The quadratic formula now gives us (with a=1, b= –2y and c= –1).
This gives us
So what sign to use? If we use the negative sign we get the log of a negative number, so we must have
The graph of this can be seen below.Up a level : The hyperbolic functions
Previous page : Hyperbolic functions – The cosinus hyperbolicus and its inverseLast modified: