A-Level Edexcel C3 January 2007 Q5(a) : ExamSolutions

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Комментарии
Автор

@NHAlexNH Yes it does work. And there is just much the same shorter method for the R cos ones. In fact I not long ago uploaded Q6 on January Q6 paper. It has one there. Check it out on my website

ExamSolutions_Maths
Автор

1/(root3) to rationalize you multiply both by root3 which gives you root3/3 surely?

DevilSlay
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I wasn't taught the short way does it work for all RSin(x+a) questions and is there a shorter way for RCos? Thanks

NHAlexNH
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I'm very confused as to why root3 goes with sin alpha. You spun the equation around, but if you had left it then it would be cos alpha?

azimkhan
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why does alpha = tan^-1 (root3/1). shouldnt it be tan^-1(1/root3)?

georgelikespie
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Im so confused - should alpha= b/a and therefore 1/root 3 ??? :(

PerfectSmilesz
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why is it not tan^-1(b/a) so ( 1/ root 3)

GamingSetupOfTheDay
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This is what I thought. Slightly confusing

Earleyy