http://img64.imageshack.us/img64/3884/29299144871470225813649.jpg
http://img69.imageshack.us/img69/5894/amath.jpg
唔該教下我, please.
跟著,
我想問第1種寫法, 還是第2種寫法才對??
http://img580.imageshack.us/img580/4065/amaths.jpg
唔該哂...
更新1:
我覺得有點複雜, 要let做sin 有冇其他方法? thanks a lot!!!
更新2:
P.S. 這2條是不是中五程度??