MCQOPTIONS
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| 1. |
α = cos-1(A.B/AB). What is the range of α?$# |
| A. | 0˚<α<90˚ |
| B. | 0˚<α<180˚ |
| C. | 90˚<α<180C |
| D. | 0˚<α<45˚ |
| Answer» B. 0‚àö√Ñ‚àö‚àÇ<‚âà√≠¬¨¬±<180‚àö√Ñ‚àö‚àÇ | |