Rcos(x-alpha) method : C3 Edexcel January 2013 Q4 : ExamSolutions Maths Revision

[ExamSolutions_Maths]

Yes, so as to make the denominator as small as possible and that will make the fraction as large as possible.

[busayo]

Really appreciate what you're doing, getting me through my C3 and C4 revision!

[DookScape]

I believe you meant to say 3 sf at the end there.. Great vid though, many thanks!

[abirowden]

I don't get how the trough of the curve gives the maximum value in part bii - wouldnt that give you the minimum? 

[xenonphilius]

Overall, that helped me a lot, but the last part where Part b ii) the answer is 4.069 (3d.p.)
instead of 4.07(3 d.p.) But still, Its a GREAT VIDEO!!!! Good Job!

[shairrauthayakumar]

Heya, for the last part, and if the paper asks for maximum - do you always take -1?

[Sablo]

link at 1:11 is broken, thanks for the videos.

[subtilizer]

Amazing video as usual, Thanks a lot.

[benrobinson]

Isn’t the max when cos(x) = 1? I thought when cos(x) = -1 that’s a min?

[robertlawrence]

I think you mean 3sf at the end. Great vid btw.