~~三角函數變變變~~(禮點一打)
把
(1 + sin θ ) / cos θ
變成一個只含 tan 函數的式子。
回答 (4)
一開始轉做tanθ會否快些?
(1+sinθ)/cosθ
= secθ + tanθ
= √sec^2 θ + tanθ
= √(1 + tan^2 θ) + tan θ
但有根號比較複雜
You can well use Half Angle Formulas and Substitution methods ( t ) to get the appropriate answers.
Cheers!
收錄日期: 2021-04-11 18:31:57
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