Prove that sin(A+B)=sinAcosB+sinBcosA [satisfy all angles]?
2011-07-28 2:52 pm
Prove that sin(A+B)=sinAcosB+sinBcosA [satisfy all angles, from -infinitive to +infinitive, not only for the acute angle]
回答 (1)
2011-07-28 2:54 pm
收錄日期: 2021-04-15 15:28:00
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