Show the steps very clearly.
1. 1/sinӨ-sinӨ/tan^2Ө
2. 1/cos^2Ө-1+tan^2Ө
3. cosӨ/1+sinӨ-1-sinӨ/cosӨ
VERY URGENT QUESTIONS (MATHS) HELP
2007-03-09 3:47 am
回答 (1)
2007-03-09 5:00 am
✔ 最佳答案
1. 1/sinӨ-sinӨ/tan^2Ө=1÷sinӨ-sinӨ÷(sin²Ө÷cos²Ө)
=1÷sinӨ-cos²Ө÷sinӨ
=(1-cos²Ө)÷sinӨ
=sin²Ө÷sinӨ
=sinӨ
2.1/cos²Ө-(1+tan²Ө)
=1÷cos²Ө-(1+sin²Ө÷cos²Ө)
=(1-1-sin²Ө)÷cos²Ө
= －tan²Ө
3. cosӨ/1+sinӨ-1-sinӨ/cosӨ
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參考: KING
收錄日期: 2021-04-12 23:24:26
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https://hk.answers.yahoo.com/question/index?qid=20070308000051KK03438