Week #20 Practice Day 98
Name ____________________________________
1. Draw a 45 − 45 − 90 triangle showing all its sides.
Use the diagram above, to determine the exact values of the following ratios.
2. cos 45°
3. sin 45°
4. tan 45°
5. (sin 45°)2
6. (cos 45°)2
7. tan 45° cos 45°
8. cot 45°
9. csc 45°
HighSchoolMathTeachers@2017
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Week #20 Practice Day 98
Name ____________________________________
10. sec 45°
11. csc 45° tan 45°
12. sec 45° sin 45°
13. (cot 45°)2
14. cot 45° sin 45° cos 45°
15. sin 45° tan 45°
16. csc 45° sec 45°
17. tan 45° cot 45°
18. (cos 45°)2 + (sec 45°)2
19. cos 45° cos 45° − tan 45°
20. sin 45° (csc 45°)2
HighSchoolMathTeachers@2017
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Week #20 Practice Day 98
Name ____________________________________
Answer keys
Day 98:
1.
W
45°
√2
1
45°
T
2.
3.
1
1
√2
1
S
11. √2
12. 1
√2
13. 1
4. 1
1
5.
6.
7.
1
14. 2
2
1
15.
1
√2
2
1
√2
8. 1
9. √2
16. 2
17. 1
18. 1
19. −
1
2
10. √2
20. √2
HighSchoolMathTeachers@2017
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