how do you solve this simultaneous equations?

sinh x + sinh y = 25/12

cosh x - cosh y = 5/12

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- November 12th 2009, 02:14 AMalexandrabel90hyperbolic
how do you solve this simultaneous equations?

sinh x + sinh y = 25/12

cosh x - cosh y = 5/12 - November 12th 2009, 03:24 AMcraig
- November 12th 2009, 03:42 AMalexandrabel90
having using your mtd, i ended up with 2e^x + 2 e^-x = 3e^y -2e^y.

i tried to let e^x = a and e^y =b and then i got

2a + 2(1/a) = 3( b) - 2(1/b)

solving a as a quadratic eqn, i got a and b to be complex numbers..

which according to my notes, it is wrong as the answer should be real values.

did i do sth wrong? - November 12th 2009, 03:48 AMmr fantastic