Solve
sinA = sinA cosA
for 0 <= A<= 360
*7分題
答案除了0,360 外，應該還有其他...
thx
F.4 maths
2012-06-11 8:24 pm
回答 (1)
2012-06-11 9:44 pm
✔ 最佳答案
Answer: A = 0, 180, 360Solution:
sin A = sin A cos A
sin A - sin A cos A = 0
sin A(1 - cos A) = 0
sin A = 0 or 1 - cos A = 0
sin A = 0 or cos A = 1
A = 0, 180, 360
參考: knowledge
收錄日期: 2021-04-28 14:20:37
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20120611000051KK00188