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回答 (4)
2007-06-15 4:23 am
✔ 最佳答案
已知sinΘ=3sin10°+sin15°,求Θ的大小. sinΘ=3x 0.1736+sin 0.2588
Θ = 51.24°
2007-06-14 20:24:08 補充：
打錯了(打多了sin)sinΘ=3sin10° sin15°,sinΘ=3x 0.1736 0.2588Θ = 51.24°
2007-06-15 4:25 am
sinΘ=3sin10°+sin15°
sinΘ=0.520944533+0.258819045
sinΘ=0.779763578
Θ=51.23893393
Θ=51.2(3s.f.)
sinΘ=0.520944533+0.258819045
sinΘ=0.779763578
Θ=51.23893393
Θ=51.2(3s.f.)
參考: 自己禁機
2007-06-15 4:23 am
sinΘ=0.520944533+0.258819045
Θ=sin(0.779763578)
Θ=51.23893393
Θ=sin(0.779763578)
Θ=51.23893393
2007-06-15 4:20 am
Try sinΘ=3xsin10°+sin15°
2007-06-14 20:21:18 補充：
sinΘ=3sin25°
2007-06-14 20:21:18 補充：
sinΘ=3sin25°
收錄日期: 2021-04-13 13:46:06
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070614000051KK04044