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Copy of Trig identities 1
Author:
Stephanie Walker
,
Bernard Murphy
The trig identities you might be asked to prove often come from a simple diagram. Here's one example.
GeoGebra
Drag the slider bar and think how the identities for sin2x, cos2x and tan2x in terms of tanx arise.
New Resources
Icosahedron
Poorly Drawn Parallelograms 3
alg2_05_05_01_applet_exp_2_flvs
Explore the invariant lines of matrix {{-2,5},{6,-9}}
alg2_05_05_01_applet_exp_flvs
Discover Resources
Lemma 9.8.2
M3L9 challenge 1
Basic Quadratics
Geoboards
Water Pouring Graph
Discover Topics
Vectors 2D (Two-Dimensional)
Logarithmic Functions
Cone
Pie Chart or Circle Chart
Histogram