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what does sinh do? how do I get inverse sin? i.e. how do I push buttons to get an angle in degrees from the ratio of triangle side lengths? same question for cos and tan buttons

Guest Apr 7, 2017
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 #1
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click 2nd then the trigonometric ratios.

Davis  Apr 7, 2017
 #2
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i am confused on dis 2

Guest Apr 7, 2017
 #3
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If you have a right-angled triangle and the opposite side length (= b, say) and the length of the hypotenuse (= h, say)

then the angle ( = B) is given by 2nd asin (b/h) enter

 

If you have the adjacent side length (= a, say) and the hypotenuse 

then B is given by 2nd acos (a/h) enter

 

If you have the opposite and adjacent side lengths

then B is given by 2nd atan (b/a) enter

 

 

"sinh" is what is known as a hyperbolic function.  It is defined as follows:

sinh(x) = (ex - e-x)/2

 

We also have cosh(x) = (ex + e-x)/2

 

and tanh(x) = sinh(x)/cosh(x)

..

Alan  Apr 7, 2017
edited by Alan  Apr 7, 2017

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