MCQOPTIONS
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| 1. |
If \[5{{\cos }^{2}}\theta +7{{\sin }^{2}}\theta -6=0\], then the general value of \[\theta \]is |
| A. | \[2n\pi \pm \frac{\pi }{4}\] |
| B. | \[n\pi \pm \frac{\pi }{4}\] |
| C. | \[n\pi +{{(-1)}^{n}}\frac{\pi }{4}\] |
| D. | None of these |
| Answer» C. \[n\pi +{{(-1)}^{n}}\frac{\pi }{4}\] | |