Friday

April 18, 2014

April 18, 2014

Posted by **Jill** on Friday, December 9, 2011 at 12:38pm.

We start out by drawing a triangle.

25 is on the side of the hypotenuse and -7 is on the adjacent side, because cos is adjacent over hypotenuse.

Somehow he gets to this halfway through: 225-49=176.

I can understand where he got the 49.

Probably from (-7)^2

I thought you had to use the equation

a^2+b^2=c^2 or

y^2+x^2=r^2

So it would be y^2 +(-7)^2=25^2

(-7)^2 is 49. Subtract this from 25^2, so we can get y^2 by itself.

Would that be going the right way?

I'm mainly just confused about how he got the 225?

- Confuses how my teacher got this? -
**Jill**, Friday, December 9, 2011 at 12:41pmHe ends up with the answers:

tan(theta)= (-square root of 176)/7 and

csc(theta)= (25 x square root of 176)/176

- Confuses how my teacher got this? -
**Steve**, Friday, December 9, 2011 at 12:49pmLooks like either the hypotenuse is 15, so 15^2 = 225

or, he made a mistake and it should have been 625, rather than 225. I think this is the case, because then you have a 7-24-25 triangle.

- Confuses how my teacher got this? -
**Jill**, Friday, December 9, 2011 at 12:53pmI think its the second one, but how did you get 625?

- Confuses how my teacher got this? -
**Steve**, Friday, December 9, 2011 at 1:09pmHe started out saying that cos = 7/25. That means that if the other leg i y, then

7^2 + y^2 = 25^2 = 625

y = 24

**Related Questions**

Algebra - I am having trouble with finding the 1st and 3rd quartiles of a set of...

Science - In my book it says Individuals of the same kind living in the same ...

Math - I Don't Know What Is This Subject Called In English But It's About ...

AVID - this is about cornell note taking...i'm done taking notes but i'm having ...

Introduction to Educational Theory - We have to analyze this situation: A ...

ECON, HELP?!? - Economyst, My prof says only a was right at 100 billion, but b, ...

math - Can you let me know if I got the correct answer. The question says the ...

math - How to I round 613,572,947 to the nearest tens. My teacher confuses me ...

algebra - Can someone explain how to do this problem? I got a different answer ...

english - What does it mean when the teacher says "There is no need to rekey the...