April 18, 2014

Homework Help: Geometry

Posted by Angela on Saturday, August 23, 2008 at 12:06pm.

y |

(hypotenuse length is 12 units)

I'm learning about trig ratios, and my dad was trying to compare it to a circle or something? All I know is
sin = a/c
cos = b/c
tan = a/b

you're trying to figure out the proportions of the lengths of the triangle relative to its angles, actually the other way around in this case.

In accordance with the ratios I listed above,
side A is opposite angle A
side B is opposite angle B
side C is opposite angle C

so, in this case, the right angle is <C and the hypotenuse is side C

thus, does: ?
sin = y/12
cos = x/12
tan = y/x

Now I'm a little confused on how to bring in the angles, and how do I know whether to use sin,cos, or tan?

What happens with a problem where I know 2 of the sides, and that it's a right triangle? I then have to figure out the other two angles x and y.

I can figure out the length of the third side using the Pythagorean theorem, but how to I reverse to figure out the angular proportions from the lengths?


Answer this Question

First Name:
School Subject:

Related Questions

Geometry-PLEASE CHECK ANSWERS! - In isosceles triangle DEF, DE=DF. Which of the ...
C++ Programming - Can any1 please fix this c++ source problem /*Circle Are ...
algebra - please check and correct thanks Problem: solve and check the ...
Trignometry - Given Triangle ABC: I think there are suppose to be right ...
algebra compare rational numbers - compare < > = 1) - 1/7 -6/7 i got : &...
C++ if else problem, please look - It compiles but it doesn't work. can you tell...
math - Which of the following is equivalent to the inequality 7>-3x>-12? a...
Trigonometry - Given Triangle ABC: Right Triangles 1. If a = 6 and <B = 53, ...
World Geography - REVIEW 1.An area in which a single culture or cultural trait ...
World Geography - REVIEW Which ecosystem usually supports thick forests of ...