Maths problem: how to do, thanks?
回答 (1)
2020-10-13 10:31 pm
✔ 最佳答案
Note: sin A = cos B ---> A+B=90°~~~~~~~~~~~~~~~~~~~~~~~~~sin (θ-24°) = cos (θ+52°)=> (θ-24°) + (θ+52°) = 90°2θ + 28° = 90°2θ = 62°∴ θ = 31°
收錄日期: 2021-04-24 08:02:04
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https://hk.answers.yahoo.com/question/index?qid=20201013111611AANHzMC