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Centre for Research in Mathematics Education (CRME)
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Trigonometric functions
This short task contains two questions on applying trigonometry.
The topics covered are:
- Linking sine, cosine and tangent
- Using Pythagoras to determine a length in a triangle and then give the tangent of an angle in surd form
- Using the Pythagorean identity sin2(x) + cos2(x) = 1 to find the value of cos(x) if sin2(x) + 2cos(x) – 2 = 0
There are pre-lesson and post-lesson formative assessment tasks. Detailed teacher notes give suggestions on questioning and how to use the resources. Full solutions are given for each of the sections.
This is a concept development lesson from the Mathematics Assessment Resource Service, a collaboration between UC Berkeley and the Shell Centre team at the University of Nottingham. Further information on the collection is given here.
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Trigonometric functions (task) 81.09 KB
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