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12. 已知三維空間中一向量= ＜2, 3,−2＞,其與座標軸(X,Y,Z)夾角分別為 α、β、γ,則 cosγ = ? (A) (B) 0 (C) (D)
問題詳情
12. 已知三維空間中一向量
= ＜2, 3,−2＞,其與座標軸(X,Y,Z)夾角分別為 α、β、γ,則 cosγ = ?
(A)
(B) 0
(C)
(D)
參考答案
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8. An unnormalized wavefunction of the hydrogen atom is given by r2e(3 cos2 θ - 1). What are the thr
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12.=？[提示：利用羅必達法則(L'Hospital's Rule)] (A) 1 (B)(C) 0 (D) 不存在
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