[cas] use of functions hyperbolic secant and cosecant and inverses

[webmasterpdx]

While I have no problem in changing the format of answers, I'm not really fond of basing functionality of the calculator on locale of exams. I'm really tired of basing the functionality of the prime on the lowest common denominator. I'm an engineer and I also do some math research, and I want to use my calculator at that level. To put it another way.....how would you feel if it were changed to output everything in terms of grade school level math....I mean that's kinda ridiculous.