The resultant of \( \overrightarrow{\mathrm{A}} \) and \( \overrigh...

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The resultant of \( \overrightarrow{\mathrm{A}} \) and \( \overrightarrow{\mathrm{B}} \) makes an angle \( \alpha \) with
\( \vec{A} \) and \( \beta \) with \( \vec{B} \), then:
(1) \( \alpha\beta \)
(2) \( \alpha\beta \) if \( \mathrm{A}\mathrm{B} \)
(3) \( \alpha\beta \) if \( AB \)
(4) \( \alpha\beta \) if \( A=B \)
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