How to write expressions in the form Rcosx A

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=HQJuGXWmOdw

We us the addition formula for cos(x - A) to find the formulae for R and A in terms of constants a and b from the expression acosx + bsinx. • This is a question that is often asked on exam papers and is relatively simple if you remember the formulae and the logic behind where it comes from. • • If you want to get some stationary to help organise your notes or get a scientific calculator then check out the link below to provide some extra support for this channel: • https://www.awin1.com/cread.php?s=518...

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