Qualification > Math
C3 and C4 DOUBTS HERE!!!
**RoRo**:
--- Quote from: mdwael on April 05, 2011, 12:10:03 pm ---Do we have to memorize the expansions of Sin(A+B), Cos(A+B), CosA CosB- SinA Sin B or they'll be given in the formula booklet?
Also does anyone know a helpful website to help me in chapters 6 and 7? (tirgnometry)
--- End quote ---
They'll be given to you in the formula booklet.
Check this site: http://www.trigonometry-help.net/
Arissa_04:
Hey guys, need help in a trig question.not sure which year it is is from.Here's how the question goes:
Using the expansion of cos(3x-x) and cos(3x+x) prove that:
1/2(cos2x - cos4x) = sin3x sinx
Its a 3 mark question so I'm pretty sure its not that complicated but I cant seem to get the answers.
Thanks in advance Smiley
mdwael:
Anyone got a link or could upload the formula booklet which is provided when you do the Maths Edexcel exam?
**RoRo**:
--- Quote from: mdwael on April 06, 2011, 10:50:51 am ---Anyone got a link or could upload the formula booklet which is provided when you do the Maths Edexcel exam?
--- End quote ---
I had asked the same question on Page 3, there you go with the link:
http://www.edexcel.com/migrationdocuments/GCE%20New%20GCE/N38210A-GCE-Mathematical-Formulae-Statistical-Tables.pdf
**RoRo**:
Can someone please explain to me how do you part b and c?
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