x,y =

mina_world

Re: x,y =

emailzul at starhub.net.sg

Re: x,y =

William Elliot

From:	mina_world
Subject:	x,y =
Date:	Mon, 24 Jan 2005 00:14:09 +0900

hello....doctor~

find the x, y such that
sinx + cosy = 1 and cosx + siny = 1
(0 < x < 2*Pi , 0 < y < 2*Pi)

very sorry, i can't...
give me a hint, please

thank you very much for your advice.

From:	emailzul at starhub.net.sg
Subject:	Re: x,y =
Date:	23 Jan 2005 07:46:25 -0800

{y = 1/2*Pi, x = 1/2*Pi}, {y = 0, x = 0}

Regards

From:	William Elliot
Subject:	Re: x,y =
Date:	Sun, 23 Jan 2005 08:04:02 -0800

On Mon, 24 Jan 2005, mina_world wrote:

> find the x, y such that
> sinx + cosy = 1 and cosx + siny = 1
> (0 < x < 2*Pi , 0 < y < 2*Pi)
>
sin x + cos y = cos x + sin y
sin x - sin y = cos x - cos y

2 cos (1/2)(x + y) * sin (1/2)(x - y) =
-2 sin (1/2)(x + y) * sin (1/2)(x - y)

> give me a hint, please