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#1 2009-12-12 07:24:28

hypfunctionshelp
Guest

What are sinh, cosh and tanh?

I know about sin, cos, and tan. But what are sinh, cosh, and tanh?

Please explain as simply as possible.

Also, what are csc(x), cot(x) and sec(x) used for? I know that they are just sin[sup]-1[/sup], cos[sup]-1[/sup] and tan[sup]-1[/sup] but what are their applications?

Thanks.

#2 2009-12-12 07:34:33

Anakin
Member
Registered: 2009-10-04
Posts: 145

Re: What are sinh, cosh and tanh?

Not much to comment on that but I've always been told and taught that csc(x), cot(x) and sec(x) do not equal sin-1, cos-1 and tan-1. Because sin-1, cos-1 and tan-1 are the sine inverse, cosine inverse and tangent inverse functions.

Csc(x), cot(x) and sec(x) are the reciprocal functions of the sin(x), tan(x) and cos(x) functions. Not the inverse of them.

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#3 2009-12-12 07:42:06

Identity
Member
Registered: 2007-04-18
Posts: 934

Re: What are sinh, cosh and tanh?

The definitions are:

They are partially related to the usual trig functions in that they interact similarly

etc

Usually you won't encounter them until university calculus

Last edited by Identity (2009-12-12 07:53:27)

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#4 2009-12-12 08:30:29

hypfunctionshelp
Guest

Re: What are sinh, cosh and tanh?

Ok, what are the uses of sinh, cosh and tanh? and when i find sinh(x) what am i actually doing?

Oh and thanks for clearing that up anakin and devnate`

#5 2009-12-26 04:00:52

random_fruit
Member
Registered: 2008-12-25
Posts: 39

Re: What are sinh, cosh and tanh?

I recall looking cosh and sinh up in Wikipedia.  If I remember correctly, they describe the way a rope hangs between two points, called a catenary.  Worth a look for yourself?

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