3-14 - Values of Trigonometric Functions Use an Addition or Subtraction Formula to find the exact value of the expression, as demonstrated in Example 1. • 3. sin 75° 4. sin 15° 5. cos 105° 6. cos 195° 7. tan 15° 8. tan 165° 197 • 9. sin 12 177 10. cos 12 11. tan (금) 12. sin 12 12 13. сos 12 14. tan 12

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