Need help- Circle and Right triangle question  TOPIC_SOLVED

Trigonometric ratios and functions, the unit circle, inverse trig functions, identities, trig graphs, etc.

Need help- Circle and Right triangle question

Postby kec21631 on Thu Jan 26, 2012 11:25 pm

Image

I need help on problem #39 in the picture.
I tried to use the pythagorean theorem to solve it and I got:
64 + r^2 = 16 + r^2
The problem is, if I do it like that I end up eliminating the variable.

Please let me know if you have any idea on how I can solve this problem.

Thanks!
kec21631
 
Posts: 2
Joined: Thu Jan 26, 2012 11:08 pm

Sponsor

Sponsor
 

  TOPIC_SOLVED

Postby stapel_eliz on Fri Jan 27, 2012 12:18 pm

kec21631 wrote:Image

I need help on problem #39 in the picture.
I tried to use the pythagorean theorem to solve it and I got:
64 + r^2 = 16 + r^2

Hint: (4 + r)2 is not equal to 42 + r2.

. . . . .Multiplying Polynomials
User avatar
stapel_eliz
 
Posts: 1802
Joined: Mon Dec 08, 2008 4:22 pm

Re: Need help- Circle and Right triangle question

Postby kec21631 on Sat Jan 28, 2012 7:29 pm

Oh! I get it now, thanks!
kec21631
 
Posts: 2
Joined: Thu Jan 26, 2012 11:08 pm


Return to Trigonometry