Recent content by Folklore

Yes of course I just assumed they where concocted from another formulae.

May I enquire as to how you came to these ?

Everything on the section was: Given the folowing values: sin(pi/6) = 1/2 cos (pi/6) = Square root 3 / 2 sin(pi/3)= Square root 3 / 2 Cos(pi/3) = 1/2 Use the addition formulae to prove that sin(pi/2) = 1

I guess you can see why I'm confused then in our lecture at university the last question was... Use the addition formulae to prove that sin(pi/2) = 1 and cos( pi /2 ) = 0. We don't get the answers to see if we are correct until the next lecture, also our next test will have silimair...

Again I must apologise the exact phrase is prove not solve, I'm sorry there. that does clear a lot up actually. thanks for the help there i'll have to remember the difference in future.

Yea sorry for been brief there Example would be using the addition formulae to solve sin(pi/2) = 1 ------------------------------------- Let me see if I would be correct here Sin (pi/2) = Sin (90) so I could write using the formulae Sin (A + B) = Sin A Cos B + Cos A Sin B...

Recently been doing some sums to do with the addition formulae, I can;t seem to get the hang of it. has anyone gor any good guides on how to use it correctly etc the main part I have trouble is when a question states use the Addition fomulae to prove *equation here* especially the double...