Ok, so I am a freshman in high school and I want to know how the sine, cosine, and tangent help you find the lengths of sides. (This is not a homework question)
I know that in a 30-60-90 degree right triangle, the relationship is 1, square root of 3, and the hypotenuse is two.
I also understand the following:
- Sine is Opposite over Hypotenuse
- Cosine is Adjacent over Hypotenuse
- Tangent is Opposite over Adjacent
The main thing I have a problem with is determining which sides are what; which one is opposite and which one is adjacent.
For instance, which angle would you use for sin30 (where angle c is the right angle, a is the top angle, and b is the angle to the right) and which angle would you use for sin60?