Math Is Fun Forum
You are not logged in.
- Topics: Active | Unanswered
Pages: 1
#1 2009-10-31 04:19:52
- chocoholic4lyf
- Guest
trig problem.....need help urgently!!!!
Let x and y be real numbers such that:
sin(x) + sin(y)= a
cos(x)+cos(y)= b
determine sin(x+y) and cos(x+y).
any help would be appreciated 
thanks in advance
#2 2009-10-31 10:47:41
- soroban
- Member
- Registered: 2007-03-09
- Posts: 452
Re: trig problem.....need help urgently!!!!
. .
. . .
. .
. . . I skipped a few steps here.
.
Offline
#3 2009-11-01 03:35:14
- chocoholic4lyf
- Guest
Re: trig problem.....need help urgently!!!!
thank you very much but i am still a bit unsure how you got hyp= b² + a²
i understand everything else.
#4 2009-11-01 13:55:37
- Identity
- Member
- Registered: 2007-04-18
- Posts: 934
Re: trig problem.....need help urgently!!!!
Offline
#5 2009-11-02 06:00:09
- chocoholic4lyf
- Guest
Re: trig problem.....need help urgently!!!!
thank you!
#6 2009-11-02 06:05:41
- Sarah12
- Guest
Re: trig problem.....need help urgently!!!!
Its Nice Knowing That you have Someone That can help you with A Problem.!!!!!!:)
#7 2009-11-02 08:17:04
- chocoholic4lyf
- Guest
Re: trig problem.....need help urgently!!!!
yes it is especially if u get a free book out of it!!!
#8 2009-11-02 08:36:55
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: trig problem.....need help urgently!!!!
Hi chocoholic4lyf;
But doesn't the book belong to soroban and identity?
Last edited by bobbym (2009-11-02 08:37:08)
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline
Pages: 1