@Barta: 3 grade in high school I guess you mean high school (age 12-18) don't you.

any way i made this to explain.

[Linked Image]

blue is sine
yellow is cosine
green is tangent

sin x = opposing side / croced side
cos x = near side / croced side
tan x = opposing side / near side

with x the corner of the triangle in degrees. pretty basic stuff <img src="/ubbthreads/images/graemlins/mage.gif" alt="" />

so in this example of 45° it would be
sin 45° = 0,70710678118654752440084436210485
cos 45° = 0,70710678118654752440084436210485
tan 45° = 1

Last edited by Morbo; 28/06/04 09:54 PM.
Not in the mood for cheese?
That excuse has more holes than a slice this fine Gorgombert!