x-x^3/3+x^5/5-x^7/7+

I am not getting the funda of the following problems- 1. Pascal triangle 2. Sin(x) series, where x is in radian sin x = x-(x^3/3!)+(x^5/5!)-(x^7/7!)+... I tried the above programs many times but no result. Can anyone provide me its solutions??????????