MCQOPTIONS
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| 1. |
The value of expression cos 60° cos 36° cos 42° cos 78° is: |
| A. | \(\dfrac{1}{8}\) |
| B. | \(\dfrac{\sqrt{3}}{8}\) |
| C. | \(\dfrac{1}{16}\) |
| D. | \(\dfrac{1}{4}\) |
| Answer» D. \(\dfrac{1}{4}\) | |