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Using ¡®Autograph¡¯ to teach
Calculus topics from AS and A2
Level Maths and Further Maths.
    Darren Barton ¨C Southampton University
               16th January 2012

             d.barton@poolehigh.poole.sch.uk

             tinyurl.com/amaths

             @mrdebarton
16/01/2012            Darren Barton ¨C Southampton Uni ¨C 16/01/12   1
Introduction to Workshop
? Five mini-sessions of 15 minutes each.
             1.) Sketching and Transforming Graphs.
             2.) Numerical Integration.
             3.) Volumes of Revolution.
             4.) Differentiating Trig Functions.
             5.) Sketching and Differentiating y = ax.
? Short presentation (5 mins).
? Hands on experimentation (10 mins).

16/01/2012                                               2
1.) Sketching and Transforming Graphs
-   Cartesian.
-   Polar.
-   Dynamic constant editor.
-   Slow plotting.




16/01/2012                          3
Can you draw the ¡®Maths Man¡¯?




  What three plenary questions could you
 ask students to summarise their learning?
16/01/2012                                   4
Extension!




16/01/2012                5
Polar Graphs
Use Autograph to experiment                         with
drawing graphs of the form

             r = a + b sin (c¦È) where a, b, c ? Z

Can you sketch these graphs?




16/01/2012                                                 6
2.) Numerical Integration
- Use Autograph to establish principle of
  ¡®Trapezium Rule¡¯ etc.
- y = x2 + 1 with domain 0 ¡Ü x ¡Ü 1 and range
  0 ¡Ü y ¡Ü 2.
- Two intervals?
- Over or under estimate?
- How do you improve the accuracy of the
  approximation?
16/01/2012                                 7
16/01/2012   8
3.) Volumes of Revolution
-   Visualising 3D shapes.
-   Using ¡®Jing¡¯ as a teaching tool.
-   Watch the hyperlinked clip.
-   http://screencast.com/t/0lkBztEAxvp
-   Now try yourself!
-   Can you drawn a ¡®rugby ball¡¯?

16/01/2012                                9
Visualising an approximation of the volume of revolution generated
  when y = x2 is rotated 2¦Ð about the x-axis using rectangular strips




16/01/2012                                                          10
Can you use Autograph to drawn the
                 ¡®rugby¡¯ ball?




16/01/2012                                11
4.) Differentiating Trigonometric Functions

-   Plot y = sin x.
-   Plot dy/dx.
-   Describe the relationship between the curves.
-   Can you explain why?
-   Can you hypothesise the relationship between
    y = cos x and the associated dy/dx curve?



16/01/2012                                      12
16/01/2012   13
16/01/2012   14
Investigate

Sketch the graphs of y = sinh(x), y = cosh(x)
and their associated derivatives.

Can you derive graphically the rules for the
derivatives of y = sinh(x), y =
cosh(x),       y = sinh(ax) etc.


16/01/2012                                  15
5.) Sketching and Differentiating y = ax
- Sketch y = ax.
- Sketch dy/dx.
- What happens as a ¡ú e?




16/01/2012                             16
16/01/2012   17

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Using Autograph to Teach Calculus

  • 1. Using ¡®Autograph¡¯ to teach Calculus topics from AS and A2 Level Maths and Further Maths. Darren Barton ¨C Southampton University 16th January 2012 d.barton@poolehigh.poole.sch.uk tinyurl.com/amaths @mrdebarton 16/01/2012 Darren Barton ¨C Southampton Uni ¨C 16/01/12 1
  • 2. Introduction to Workshop ? Five mini-sessions of 15 minutes each. 1.) Sketching and Transforming Graphs. 2.) Numerical Integration. 3.) Volumes of Revolution. 4.) Differentiating Trig Functions. 5.) Sketching and Differentiating y = ax. ? Short presentation (5 mins). ? Hands on experimentation (10 mins). 16/01/2012 2
  • 3. 1.) Sketching and Transforming Graphs - Cartesian. - Polar. - Dynamic constant editor. - Slow plotting. 16/01/2012 3
  • 4. Can you draw the ¡®Maths Man¡¯? What three plenary questions could you ask students to summarise their learning? 16/01/2012 4
  • 6. Polar Graphs Use Autograph to experiment with drawing graphs of the form r = a + b sin (c¦È) where a, b, c ? Z Can you sketch these graphs? 16/01/2012 6
  • 7. 2.) Numerical Integration - Use Autograph to establish principle of ¡®Trapezium Rule¡¯ etc. - y = x2 + 1 with domain 0 ¡Ü x ¡Ü 1 and range 0 ¡Ü y ¡Ü 2. - Two intervals? - Over or under estimate? - How do you improve the accuracy of the approximation? 16/01/2012 7
  • 9. 3.) Volumes of Revolution - Visualising 3D shapes. - Using ¡®Jing¡¯ as a teaching tool. - Watch the hyperlinked clip. - http://screencast.com/t/0lkBztEAxvp - Now try yourself! - Can you drawn a ¡®rugby ball¡¯? 16/01/2012 9
  • 10. Visualising an approximation of the volume of revolution generated when y = x2 is rotated 2¦Ð about the x-axis using rectangular strips 16/01/2012 10
  • 11. Can you use Autograph to drawn the ¡®rugby¡¯ ball? 16/01/2012 11
  • 12. 4.) Differentiating Trigonometric Functions - Plot y = sin x. - Plot dy/dx. - Describe the relationship between the curves. - Can you explain why? - Can you hypothesise the relationship between y = cos x and the associated dy/dx curve? 16/01/2012 12
  • 15. Investigate Sketch the graphs of y = sinh(x), y = cosh(x) and their associated derivatives. Can you derive graphically the rules for the derivatives of y = sinh(x), y = cosh(x), y = sinh(ax) etc. 16/01/2012 15
  • 16. 5.) Sketching and Differentiating y = ax - Sketch y = ax. - Sketch dy/dx. - What happens as a ¡ú e? 16/01/2012 16