Cosine rule (Finding an Angle) : ExamSolutions

[harrypotter4908]

where the hell did he get that 0.3.... coz when i put that in my calculator i get a different answer m so confused someone explain please

[ahmed12348]

thumbs up if Hawker college brought you here

[NoobsTownFan]

I want this guy to be my teacher instead :)

[Coolguy118118]

Got an exam coming up and didn't get any of this but then I watched your videos and it is now easy. Thanks a lot, great videos.

[ExamSolutions]

@Coolguy118118 Good luck for the exam

[Coolguy118118]

@ExamSolutions Thanks



[holynah9]

fuck me it doesnt give me that decimal do you have to put something in brackets on the calculator for the first question i get a decimal of -771.3709

[Malookii96]

thankyouuu<3

[dexdoes]

u gota simplify it more then showed

23.24/70.76 that gives u the decimal .3284

just had to divide and get the decimal then do the final step it fondled me for a bit also

[ugotparred]

@examsolutions...what do you do when the total of your number given after is a negative number..how can you inverse that...for instance cosx = 4^2 + 9^2-7^2/ 2 x 4 x 9 = -785?...please i need some help!

[flodgerthedodger]

Thanks, Really appreciate this ! 

[mattgomes28]

I dont know if you are a Examiner, but the first higher Edexcel gcse paper was the most hard one in 5 years (my teacher said that lol) and i hope i revise the right thing for the calc. paper.... THX MATE

[ExamSolutions]

@mattgomes28 Hi - No I am not an examiner but I have heard that it was quite tricky

[thesamster199]

thanks mate this has been a great help but i understand your cosine rule but i dont understand the one exams papers give could i just use the one you did instead?

[ExamSolutions]

@thesamster199 Of course (it is the same thing though)

[thesamster199]

thanks mate you have probably saved my maths gcse

[ExamSolutions]

@thesamster199 Hope so.

[hannapaisley]

it is really helpful and has benefited me greatly in understanding the process.

How do you actually put the data in the calculator because whenever i do your examples i don't get the same answer?

[ExamSolutions]

@hannapaisley Make sure your calculator is in degrees mode. You should see a D on the screen for most calculators. Use the fraction button if not make sure you use brackets. Try again and see if you get the answer this time.

[hannapaisley]

@ExamSolutions It is in degrees mode. I tried it with brackets and I still get 400 and something?

Where do you actually need to put the brackets to get the correct answer?

[ExamSolutions]

@hannapaisley I think I now see your problem. Type in the top line press equals as i think you are doing. Now press divide but use a bracket and enter the bottom line. Close bracket and press equals. Hope that works for you now.

[navssall]

i watched a lot of your vids there great! one flaw is you kinda teach slowly maybe try speeding it up?

Thanks

[ExamSolutions]

@navssall Thanks but I teach slowly on purpose. You cannot please everyone.

[Thekaylafreeman]

whats the write way to put it into the calculator? where do you put the cos?

[MushuRainbow]

you are really accurate with drawing on computer with a mouse i presume? or maybe bamboo? not sure but its very clear, thanks a bunch!

[hhumpo21]

does every teacher suck but you? i like owe you my a-level. very, very grateful!

[itburnsforyou]

Thank you, I now understand it :D

[ExamSolutions]

@itburnsforyou Cool

[LipstyM]

if my teacher had just explained it like how you did, i would have understood it first time round, you have made me realise how rubbish my teacher!!!!! THANKS! :)

[ExamSolutions]

@LipstyM I didn't intend that

[LipstyM]

@ExamSolutions no i know you didnt, but im glad i found this video! did my prelim today, and found it quite (dont want to be too confident) easy!! :) thanks!

[zXFreeStyleXz]

thanks just what i was looking for, you're a star!

[ExamSolutions]

@zXFreeStyleXz cool

[heavymetaldeath4life]

Congratulation on your 1000th video :D

[ExamSolutions]

@heavymetaldeath4life Thank you

[heavymetaldeath4life]

@ExamSolutions By the way, have you done worked solutions for MEI past papers on your website? I can't seem to find them.

[ExamSolutions]

@heavymetaldeath4life Sorry no - just Edexecel

[heavymetaldeath4life]

@ExamSolutions Oh, but they are quite similar so can I still use them?

[ExamSolutions]

@heavymetaldeath4life Of course