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1. |
Let \(\vec a, \vec b\) and \(\vec c\) be three vector having magnitudes 1, 1 and 2 respectively, If \(\vec a \times (\vec a \times \vec c) - \vec b = 0\) then the acute angle between \(\vec a\) and \(\vec c\) is |
A. | π / 4 |
B. | π / 6 |
C. | π / 3 |
D. | None |
Answer» C. π / 3 | |