Find a possible formula for the trigonometric function whose values
are in the following table (note the values in the table may be
slightly rounded):
| 0.00 | 0.17 | 0.33 | 0.50 | 0.67 | 0.83 | 1.00 | 1.17 | 1.33 | 1.50 | 1.67 | 1.83 | 2.00 |
| 4.00 | 5.50 | 6.60 | 7.00 | 6.60 | 5.50 | 4.00 | 2.50 | 1.40 | 1.00 | 1.40 | 2.50 | 4.00 |
help (formulas)