F.2 Trigonometric
回答 (1)
2008-05-30 12:12 am
✔ 最佳答案
1+2cos^2(32)+2cos^2(58)=1+2cos^2(32)+2sin^2(32)
=1+2[cos^2(32)+sin^2(32)]
=1+2
=3
收錄日期: 2021-04-23 20:23:57
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https://hk.answers.yahoo.com/question/index?qid=20080529000051KK01266