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

x

________________<20*

|<90*

y |

|<70*

(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?

Thanks

## Answer This Question

## Related Questions

- Math (Trig) - Find the indicated ratios in the triangle. Right triangle with a ...
- Geometry - In right triangle ABC, the median to the hypotenuse has length 15 ...
- Math (Trig) - I have a unit circle graph like the one at the top of a website (...
- Math - If the radius of a circle is 3960 the angle is 1.59 the arc length is 110...
- math/geometry - complete the statements: To find the length of the hypotenuse of...
- geometry - In a right triangle, one side is 9 units in length, and the ...
- Geometry - My class is learning about the areas of regular polygons and circles ...
- geometry - An isosceles right triangle has a hypotenuse of 8 units. What is the ...
- trig - use an inverse trig function to write è as a function of x (There is a ...
- Geometry and Measurement - I am trying to solve the length of the hypotenuse of ...

More Related Questions