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#1 2007-01-12 02:02:21

soha
Real Member
Registered: 2006-07-07
Posts: 2,530

problem......................

i need help in this problemdunno
IF secθ +tanθ=q,prove that sinθ=


dunno
up

Last edited by soha (2007-01-12 02:04:59)


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#2 2007-01-13 03:06:16

soha
Real Member
Registered: 2006-07-07
Posts: 2,530

Re: problem......................

pls help me in this problem
as early as possible


"Let us realize that: the privilege to work is a gift, the power to work is a blessing, the love of work is success!" smile smile
- David O. McKay

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#3 2007-01-13 03:47:07

Ricky
Moderator
Registered: 2005-12-04
Posts: 3,791

Re: problem......................

You can start off with the fact that:

sec = 1/cos
tan = sin/cos

And try to go from there.


"In the real world, this would be a problem.  But in mathematics, we can just define a place where this problem doesn't exist.  So we'll go ahead and do that now..."

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#4 2007-01-13 03:56:11

soha
Real Member
Registered: 2006-07-07
Posts: 2,530

Re: problem......................

well,i will try


"Let us realize that: the privilege to work is a gift, the power to work is a blessing, the love of work is success!" smile smile
- David O. McKay

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#5 2007-01-14 22:15:48

gnitsuk
Member
Registered: 2006-02-09
Posts: 121

Re: problem......................

All you need is:

Here's how:

Therefore

Therefore

and

Therefore

Look at the numerator, the 1 - c^2 part is equal to s^2.

In the denominator we have c^2+s^2 which is 1 so we now have:

Last edited by gnitsuk (2007-01-14 22:21:18)

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