MCQOPTIONS
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| 1. |
If \({\rm{cos}}\left( {{\rm{\alpha }} + {\rm{\beta }}} \right) = \frac{3}{5},\;{\rm{sin}}\left( {{\rm{\alpha }} - {\rm{\beta }}} \right) = \frac{5}{{13}}\;\)and \(0 < \alpha ,{\rm{\;}}\beta < \frac{\pi }{4}\), then tan 2α is equal to: |
| A. | \(\frac{{63}}{{52}}\) |
| B. | \(\frac{{63}}{{16}}\) |
| C. | \(\frac{{21}}{{16}}\) |
| D. | \({\rm{\;}}\frac{{33}}{{52}}\) |
| Answer» C. \(\frac{{21}}{{16}}\) | |