+428 you can look at the question right after this, he/she ask the same question. :) but a quick explanation, it is basically the learning of angles and slides. the basic trigonometry only uses the right triangle, also you need to know a^2+b^2=c^2 and sin=opposite/hypotenuse cos=adjacent/hypotenuse and tan=opposite/hypotenuse, I hope that help. :)
