i am confusing, plz help.....
lim h→0 { [sin (π+h) - sin(π)] / h}
the answer is -1......but i don't know how to solve
plz show me the process....thank you very much!!!
math problem--limit
2007-08-07 6:23 pm
回答 (2)
2007-08-07 7:23 pm
✔ 最佳答案
lim h→0 { [sin (π+h) - sin(π)] / h}Let f(x) = sin x
The above expression can be expressed as:
lim h -> 0 { [ f(x + h) - f(x) ] / h }
You see, it's just to find d/dx (sin x) |x = π
so the answer is cosπ = -1
2007-08-07 8:29 pm
收錄日期: 2021-04-13 00:57:47
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070807000051KK01027