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A Geometric proof of the sum and difference formulae for sin and cos (MathsCasts)

A Geometric proof of the sum and difference formulae for sin and cos (MathsCasts)

Released Tuesday, 27th August 2013
Good episode? Give it some love!
A Geometric proof of the sum and difference formulae for sin and cos (MathsCasts)

A Geometric proof of the sum and difference formulae for sin and cos (MathsCasts)

A Geometric proof of the sum and difference formulae for sin and cos (MathsCasts)

A Geometric proof of the sum and difference formulae for sin and cos (MathsCasts)

Tuesday, 27th August 2013
Good episode? Give it some love!
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We prove the formula for sin(A-B) using right-angled triangles then we show how the corresponding formulae for cos(A-B) and sin and cos of A+B can be deduced as a result.
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MathsCasts: Geometry and Topology

These 'Geometry and Topology' related MathsCasts are produced by the mathematics support centres at Swinburne University, the University of Limerick and Loughborough University. They are part of an ongoing collaborative research project to develop high quality resources and investigate the effectiveness of MathsCasts to support mathematics learning. They are mostly targeted at prerequisite to first year level, in a range of subjects such as: Engineering, Sciences, Business, Computing and Technology. We have also commenced production of second year mathematics topics. MathsCasts are licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License The three mathematics support centres can be contacted the following way: MASH Centre (Swinburne, Australia) http://www.swinburne.edu.au/engineering/mathematics/mash MLC (Limerick, Ireland) http://www.ul.ie/~mlc MLSC (Loughborough, UK) http://mlsc.lboro.ac.uk

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