Sam 45 Posted May 14, 2005 Report Share Posted May 14, 2005 Ok i need help with higher maths...exam on friday This is what im stuck withsolve the equation sin2x - cosx = 0 for 0<x<180I know it has something to do with trig formulae but thats about it. Quote Link to comment Share on other sites More sharing options...
Christy Posted May 14, 2005 Report Share Posted May 14, 2005 ...maths should be a piece of pish. It's the spelling exam you should be worried aboutLove from Christy Quote Link to comment Share on other sites More sharing options...
Skacel Posted May 14, 2005 Report Share Posted May 14, 2005 sin2x = 2sinxcosx so 2sinxcosx= cosxdivide by cosx to get 2sinx = 1 then sinx = 1/2 inverse sin of 1/2 gives answer from exact valuesnot sure if this is correct as its been a while since i did higher maths. Quote Link to comment Share on other sites More sharing options...
JME Posted May 14, 2005 Report Share Posted May 14, 2005 Ok i need help with higher maths...exam on friday This is what im stuck withsolve the equation sin2x - cosx = 0 for 0<x<180I know it has something to do with trig formulae but thats about it. Hah, im currently revising AH maths at the mo, so.. turns into 2sinxcosx - cosx = 0 cosx( 2sinx - 1 ) = 0 That should help you get started Quote Link to comment Share on other sites More sharing options...
Skacel Posted May 14, 2005 Report Share Posted May 14, 2005 Hah' date=' im currently revising AH maths at the mo, so.. turns into 2sinxcosx - cosx = 0 cosx( 2sinx - 1 ) = 0 That should help you get started[/quote']thats just made me doubt my answeranyway ive got some revision of my own to do. Quote Link to comment Share on other sites More sharing options...
JME Posted May 14, 2005 Report Share Posted May 14, 2005 thats just made me doubt my answeranyway ive got some revision of my own to do. Nah you are right i just gave the starting basis Quote Link to comment Share on other sites More sharing options...
A.Pel Posted May 14, 2005 Report Share Posted May 14, 2005 Dude.. if the same person who wrote the standard grade exam writes the higher one then your fucked.Too hard. Quote Link to comment Share on other sites More sharing options...
Magik Posted May 14, 2005 Report Share Posted May 14, 2005 i am not looking forward to the maths exam. i to frequently get stubbed by the trig side of it. does anyone else have a stupid amount of exams this week? ive got 3 and revision is starting to take its toll. arrrrgggood luck to everyone who reads this and has exams coming up! Quote Link to comment Share on other sites More sharing options...
Farmerjoline Posted May 14, 2005 Report Share Posted May 14, 2005 x is between 0 and 180hope this helpsonce you find x multiply it by 2 to get the sineand multiply it by 1 to get the cosineoh and pei is 3.14 - this should give you a hint as to what you need to draw to make it much easier to calculate, also plot points when doing thisif you can find the secant first its much easier Quote Link to comment Share on other sites More sharing options...
Wishbone G Posted May 14, 2005 Report Share Posted May 14, 2005 does anyone else have a stupid amount of exams this week? Next exam is on the 30th Then its plain sailing all the way to uni Quote Link to comment Share on other sites More sharing options...
ClicheGuevara Posted May 14, 2005 Report Share Posted May 14, 2005 Yeah that's right, cosx( 2sinx - 1 ) = 0, so work from cosx=0 and sinx=0.5If you do need the full awnser, i could start from the start and go right through to the final awner if you want, just ask Quote Link to comment Share on other sites More sharing options...
Marn Posted May 14, 2005 Report Share Posted May 14, 2005 i am not looking forward to the maths exam. i to frequently get stubbed by the trig side of it. does anyone else have a stupid amount of exams this week? ive got 3 and revision is starting to take its toll. arrrrgggood luck to everyone who reads this and has exams coming up!I've got geography, biology and maths next week, so I'll be spending my birthday revising but I'm finished on the 24'th so its sleeping time after that. Quote Link to comment Share on other sites More sharing options...
ClicheGuevara Posted May 14, 2005 Report Share Posted May 14, 2005 Hahaha, i just noticed the error in the title!Yeah, i'm in highers at the moment too; maths, physics, info sys and tech st still to go. Quote Link to comment Share on other sites More sharing options...
Marn Posted May 14, 2005 Report Share Posted May 14, 2005 Did anyone else sit higher english?I can safely say I did badly. Quote Link to comment Share on other sites More sharing options...
Larsen B Posted May 14, 2005 Report Share Posted May 14, 2005 Next exam is on the 30th Then its plain sailing all the way to uni But when you get there Carrey Miller is gonna punish your ass! Quote Link to comment Share on other sites More sharing options...
ClicheGuevara Posted May 15, 2005 Report Share Posted May 15, 2005 Did anyone else sit higher english?I can safely say I did badly.I only had one poem and one short story (two actually, one badly though) learned up.Both came up perfectly I'm still expecting a C though.... Quote Link to comment Share on other sites More sharing options...
lollerskates Posted May 15, 2005 Report Share Posted May 15, 2005 you need to do Linear Algebra in second year at Aberdeen uniseriously, the course might as well have been called "wtf maths" Quote Link to comment Share on other sites More sharing options...
arcadian Posted May 15, 2005 Report Share Posted May 15, 2005 you need to do Linear Algebra in second year at Aberdeen uniseriously' date=' the course might as well have been called "wtf maths"[/quote']haha, i had to do that, and a bunch of really advanced maths things when i did a college course before i decided to do chemistry instead - i could understand it all perfectly at the time, but now if i look at those sorts of things now i don't have a clue what's going on! Quote Link to comment Share on other sites More sharing options...
Rach_69 Posted May 15, 2005 Report Share Posted May 15, 2005 "Did anyone else sit higher english?I can safely say I did badly."i did, i didnt think i did too badly, i opened up the essay paper and both my questions were there im trying not to be confident coz i was in the prelim and failed it by 3 marks next one is higher physics on the 24th, higher info systems on the 26th, art history on the 31th and higher psychology on the 2nd junethen muchos alcohol will be consumed Quote Link to comment Share on other sites More sharing options...
lindeh Posted May 15, 2005 Report Share Posted May 15, 2005 when my year did the standard grade maths exam, the bints at SQA gave us the higher paper instead. Quote Link to comment Share on other sites More sharing options...
Gumpy Posted May 15, 2005 Report Share Posted May 15, 2005 a girl...solving a maths problem...you know what this means dont you......WITCH!!!! Quote Link to comment Share on other sites More sharing options...
calum Posted May 15, 2005 Report Share Posted May 15, 2005 Dude.. if the same person who wrote the standard grade exam writes the higher one then your fucked.Too hard.Agreed. Wisnae much fun. Quote Link to comment Share on other sites More sharing options...
pandy Posted May 18, 2005 Report Share Posted May 18, 2005 highers=easy Quote Link to comment Share on other sites More sharing options...
Bodast Posted May 18, 2005 Report Share Posted May 18, 2005 highers=easy Totally, stop whining and look at the advanced higher papers! Although biology was kind of ok and French was piss easy Quote Link to comment Share on other sites More sharing options...
qzdiablo Posted May 18, 2005 Report Share Posted May 18, 2005 somebody explain to me what "seven" is without referring to any other mathematical phenomena (numbers, equations etc) Quote Link to comment Share on other sites More sharing options...
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