G S Rehill's Interactive Maths Software Series - "Building a Strong Foundation in Mathematics" available from mathssoftware.co.nz

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Year 9 Interactive Maths - Second Edition


Projects

Project 15.1  Table of Sine Values

Draw the unit circle shown, and divide the radius into 10 equal parts along the axes so that each part represents 0.1.  Then divide the circle into 8 equal parts, as shown by the ticks.

1. Find coordinates of the following points:

a.  A
b.  B
c.  C
d.  D
e.  P

2.  Use a trig-master (or ruler and protractor) to create a table of sine values correct to one decimal place.


Extensions

5.  A table of cosine values can be created with the help of a unit circle (or trig-master).  Investigate.

6.  A table of tangent values can be created with the help of a unit circle (or trig-master).  Investigate.

Your report should include the following:

  • The statement of the problem in your own words
  • The tables, graphs and all working
  • References
  • Acknowledgments
  • Appendices


Project 15.2  Exact Values



 

Study Another Topic in Chapter 15: Trigonometry

Naming the Sides of a Right-Angled Triangle ] Finding Side-Lengths ] Using the Cosine Ratio ] Using the Tangent Ratio ] Using a Graphics Calculator ] Finding Angles ] Using Inverse Cosine ] Using Inverse Tangent ] Problem Solving ] Problem Solving Unit ] [ Projects ] Symbols ] Index ]

 

Study Another Chapter
 

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