MCQOPTIONS
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| 1. |
The product \[\mathbf{cos}\,{{\mathbf{1}}^{^{\mathbf{o}}}}\mathbf{cos}{{\mathbf{2}}^{\mathbf{o}}}\mathbf{cos}{{\mathbf{3}}^{\mathbf{o}}}\mathbf{cos}{{\mathbf{4}}^{\mathbf{o}}}.....\mathbf{cos18}{{\mathbf{0}}^{\mathbf{o}}}\]is equal to |
| A. | \[-1\] |
| B. | \[\frac{1}{4}\] |
| C. | 1 |
| D. | 0 |
| Answer» E. | |