See the answers to Exercise 17(d) on graphing trigonometric functions. 
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Year 10 Files
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Algebra Revision. A quick refresher of Expanding & Factorising algebraic expressions.  51k  v. 4  Apr 21, 2009, 4:24 AM  Eddie Woo  
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1261k  v. 1  May 10, 2010, 7:02 PM  Eddie Woo  
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1373k  v. 1  Jun 30, 2010, 6:10 PM  Eddie Woo  
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Activity that consolidates understanding of the relationship between intercepts on chords, tangents and secants.  53k  v. 3  Sep 27, 2009, 2:56 PM  Eddie Woo  
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Graphing functions that consist of different functions combined through the four basic operations.  59k  v. 3  Sep 27, 2009, 2:55 PM  Eddie Woo  
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1088k  v. 1  Nov 9, 2010, 3:25 PM  Eddie Woo  
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Topic test for Coordinate Geometry.  53k  v. 3  Sep 29, 2009, 6:16 PM  Eddie Woo  
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Gradients of Perpendicular Lines. An alternative proof for demonstrating that perpendicular gradients are negative reciprocals of each other.  80k  v. 5  Apr 21, 2009, 3:58 AM  Eddie Woo  
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Combined topic test for Graphing and Trigonometric Identities & Equations.  59k  v. 3  Sep 29, 2009, 6:17 PM  Eddie Woo  
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Derivation of Perpendicular Distance Formula, by means of the standard distance formula and some fancy algebraic footwork.  92k  v. 4  Apr 21, 2009, 3:55 AM  Eddie Woo  
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Topic test for Probability.  93k  v. 3  Sep 29, 2009, 6:17 PM  Eddie Woo  
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Summary of the JRAHS Mathematics Program for Year 10.  57k  v. 3  Sep 20, 2009, 7:15 PM  Eddie Woo  
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The Pythagorean Relationship, including derivation of the trigonometric identity and practice exercises.  74k  v. 6  Apr 21, 2009, 3:55 AM  Eddie Woo  
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Quadratic Theory Revision. Advanced year 9 level quadratic questions, to refresh the memory and prepare for the year 10 topic.  58k  v. 5  Apr 21, 2009, 3:59 AM  Eddie Woo  
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Derivation of Viète's formulas for quadratic and cubic equations.  68k  v. 3  Oct 1, 2009, 2:21 PM  Eddie Woo  
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Bearings Worksheet. Exercises for consolidation of trigonometry in the context of bearings. Diagrams essential!  30k  v. 5  Apr 21, 2009, 3:56 AM  Eddie Woo  
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Trigonometric Functions & the Unit Circle. Investigation of the relationship between the sine, cosine and tangent ratios and the unit circle, by means of coordinate geometry techniques.  104k  v. 5  Apr 21, 2009, 4:00 AM  Eddie Woo  
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378k  v. 2  Jun 30, 2010, 6:10 PM  Eddie Woo  
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Short series of questions designed to review the core skills and formulae in Year 10 Trigonometry.  57k  v. 3  Sep 27, 2009, 2:56 PM  Eddie Woo  
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3460k  v. 1  May 19, 2010, 7:21 PM  Eddie Woo 