This is a complete lesson on geometrically proving and then applying the addition formulae. The lesson consists of 30 slides which guide students through a step-by-step proof of sin(A+B) and cos(A+B), then how to prove tan(A+B) and all the subtraction versions from these, plus a further six slides covering three common questions on the application of the formulae (which can be used as examples or as questions). It also includes copies for the students to complete as you go along.
Resources included:
A PPT and smart notebook file 36 slides long with a detailed step-by-step proof using SOHCAHTOA.
A student copy of the initial diagrams for them to work from
There is a separate file for PPT and notebook.
If you have any suggestions or complaints about this resource, or a request for other resources, do not hesitate to contact me via lastminutemathslesson@gmail.com.
Thanks!
Chris @ Last Minute Maths
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£2.00