trigonometric identities
2009-05-02 8:58 pm
If tanA=5/3 , find the value of 4sinA/(3sinA-cosA) by using trigonometric identities.
回答 (1)
2009-05-02 9:08 pm
✔ 最佳答案
If tanA=5/3 , find the value of 4sinA/(3sinA-cosA) by using trigonometric identities. Sol
4sinA/(3sinA-cosA)
=(4sinA/cosA)/(3sinA/cosA-cosA/cosA)
=4tanA/(3tanA-1)
=(4*5/3)/(3*5/3-1)
=(20/3)/(5-1)
=5/3
收錄日期: 2021-04-23 18:27:32
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090502000051KK00698