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Devantè

Real Member

Registered: 2006-07-14

Posts: 6,400

Using a Calculator for Inverse Functions

Exercises on Using a Calculator for Inverse Functions

Not too hard, unless you have a calculator nearby. If you don't, then don't try this exercise.

Use a calculator to answer the following questions.

1. tan-¹ 0.47
2. sin-¹ 0.99
3. cos-¹ 1
4. tan-¹ 3.31
5. cos-¹ 0.44
6. sin-¹ 0.47
7. cos-¹ 0.1
8. tan-¹ 0.53
9. tan-¹ 4.33
10. cos-¹ 0.4
11. sin-¹ 0.34
12. sin-¹ 0.31
13. sin-¹ 0.87
14. sin-¹ 1
15. tan-¹ 0.97
16. tan-¹ 5.67
17. cos-¹ 0.86
18. cos-¹ 0.81
19. sin-¹ 0.97
20. cos-¹ 0.02
21. sin-¹ 0.28
22. tan-¹ 0.08
23. cos-¹ 0.59
24. sin-¹ 0.12
25. tan-¹ 1.11
26. cos-¹ 0.87
27. tan-¹ 2.36
28. sin-¹ 0.6
29. cos-¹ 0.15
30. tan-¹ 2.97
31. tan-¹ 1.15
32. sin-¹ 0.83
33. sin-¹ 0.98
34. tan-¹ 0.34
35. cos-¹ 0.26
36. sin-¹ 0.93
37. cos-¹ 0.63
38. tan-¹ 1.38
39. cos-¹ 0.96

Toast

Real Member

Registered: 2006-10-08

Posts: 1,321

Re: Using a Calculator for Inverse Functions

Make sure your calculator is in degree mode.
This exercise can be done with the windows scientific calculator. Simply tick the 'Inv' box, the number, then sin, cos or tan.
For instance, to find the inverse function of tan-¹ 0.24, type:
Inv -> 0.24 -> tan

MathsIsFun

Administrator

Registered: 2005-01-21

Posts: 7,711

Re: Using a Calculator for Inverse Functions

Yes, that works.

Or 0.24 -> inv -> tan.

I get 13.4957... (degrees)

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"The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  - Leon M. Lederman