8.1.2 Trigonometric Ratios - Worksheet
Example 1: Write each trigonometric ratio as a fraction and as a decimal rounded to the nearest hundredth. 1. sin C 2. tan A 3. cos A A
5
4
4. cos C
5. tan C
6. sin A
B
C
3
Example 2: Use a special right triangle to write each trigonometric ratio as a fraction. 7. cos 60 ° 8. tan 30º 9. sin 45 ° Example 3: Use your calculator to find each trigonometric ratio. Round to the nearest hundredth. 10. tan 67º 11. sin 23 ° 12. sin 49 ° 13. cos 88º 14. cos 12º 15. tan 9º Example 4: Find each length. Round to the nearest hundredth. 16. BC C 17. QR P 18. KL J
K
4 in.
50°
2.5 cm 61°
8.1 m
23°
B
A
L
R
Q
Example 5: 19. A pediment has a pitch of 15º, as shown. If the width of the pediment, WZ , is 56 ft, what is XY to the nearest inch?
X
15°
W
Z
Y
66
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