mathematics formulae/trigonometry and calculas?
536268
There are lot of formulas in trignometry and calculas\nFor trignometry formulas refer to\nhttp://mathforum.org/dr.math/faq/formulas/faq.trig.html\nFor Calculus formulas refer to\nhttp://www.math.com/homeworkhelp/Calculus.html
396671
try www.quickmath.com and www.calculator.com. I have a lot of others if you want them.
540612
give me ten points if u need further help just mail to me.\n\nhttp://tutorial.math.lamar.edu/AllBrowsers/2413/2413.asp\n\nhttp://www.calculus.org/\n\nhttp://www.math.ucdavis.edu/~mikew/free_calc.pdf\n\nhttp://www.math.gatech.edu/~cain/notes/calculus.html\n\nhttp://www.exambot.com/cgi/topic/list.cgi/math/difc?class=hlink
152350
http://www.math.com/students/calculators/calculators.html
880627
Do you mean verifying trig identities?\n\nTry: ask dr math\n\nIf you have a specific trig question, write back.\n\nGuido
94089
Open a trigonometry book!
51149
http://www.mathgoodies.com/\nhttp://www.gomath.com/\nhttp://www.mathnerds.com/mathnerds/\n\nhope these sites help you..happy studying!!
176564
http://www.math.com/\nhttp://mathworld.wolfram.com/\nhttp://www.calculus-help.com/\nhttp://math.about.com/od/calculus/
1054686
Job one, convert everything to trig functions of a single angle, namely x.\n\nsin2x=2sinxcosx\ncos2x=cos^2(x)-sin^2(x)=2cos^2(x)-1=1-2sin^2(x)\n\nThen substitute in and simplify:\n2sinxcosx+2(2cos^2(x)-1)=1+sinx-4cosx\n2sinxcosx+4cos^2(x)-2-1-sinx+4cosx=0\n4cos^2(x)+2sinxcosx-sinx+4cosx-3=0\n\nFactor this into:\n(2cosx-1)(2cosx+sinx+3)=0\n\nset each parantheses equal to zero\n2cosx-1=0   \ncosx=1/2\nx=arccos(1/2)\nx={pi/3, 5pi/3} + 2pi*n  where n=0,1,2....\n\nAnd\n\n2cosx+sinx+3=0\n\nSolved numerically gives imaginary solutions of\n{-i*ln((-2/5)-(i/5),-i*ln(-2-i)}\n\nSolved....
640703
As the pi is present in both questions, it is generally written in radians and not degrees. So either:\na) change the mode of your calculator to radians or\nb) Multiply your radian value by 180 degrees and divide this by pi.\n\n1. cos 5/3 pi = cos300 = 0.5\n2. sin 7/4 pi = sin315 = -0.707 (or -1/SQRT2)
961572
Try to find a book on analytic geometry (which should also cover trigonometry), and one that has lots of exercises, which will help you retain all that information.  There used to be a book called Geometry & Trigonometry for Calculus, but it's out of print.  As per the algebra, try to find a cheap Dover Classics book through amazon, they are usually only $10-20.  Also, the following site may help you:\nhttp://ltcconline.net/greenl/courses/152a/152a.htm\nhttp://ltcconline.net/greenl/courses/152b/152b.htm\nhttp://ltcconline.net/greenl/courses/154/154.htm\nhttp://tutorial.math.lamar.edu/AllBrowsers/2413/TrigEquations.asp\nhttp://tutorial.math.lamar.edu/AllBrowsers/2413/TrigFcns.asp\n\nGood luck!\n\nSteve
727921
I've read the Trigonometry for Dummies and the Calculus for Dummies books, both were quite helpful. There is also an algebra workbook for dummies, but it's probably not worth getting if you're taking an algebra class.
911935
I would suggest purchasing a book like Forgotten Calculus and Forgotten Algebra by Barbara Lee.  I used those for Calc I and for Calc II I used Schaum's 3000 solved problems in Calculus and the site http://tutorial.math.lamar.edu/ for when I wanted instructions or a quick understanding of algebra, trigonometry and calculus.  There are something called cheat sheets, which will give you the most common rules.  Don't forget, you need a really good understanding of Algebra before you can tackle calculus.  Trigonometry is not too bad.  Good luck.
369033
Most handheld calculators just use Taylor series expansions to approximate the value.  For example, if the angle x is in radians, then\n\ncos(x) = 1 - (1/2) x^2 + (1/24) x^4 - (1/720) x^6 + ...\nsin(x) = x - (1/6) x^3 + (1/120) x^5 - (1/5040) x^7 + ...\ntan(x) = x + (1/3) x^3 + (2/15) x^5 + (17/315) x^7 + ...\n\nYour calculator has a polynomial (maybe of degree 50?) written into its memory which can calculate sine and cosine to a remarkable accuracy -- but it's only an approximation in the end.\n\nOther more powerful programs, such as Mathematica, MATLAB, or even Maple use slightly more sophisticated ideas.  They have a built in database which contain the *exact* value of the trigonometric functions for certain angles x.  For instance, they would know that cos(pi/3) = 1/2 -- something which is not obvious from the Taylor series expansion above!
133118
There are formulas on the following page:\n\nhttp://www.acts.tinet.ie/trig.ratiosforacuteang_668.html
449531
Knowing trig makes learning calculus easier.
728780
Wikipedia - reasonably complete, very concise and well-indexed\nhttp://en.wikipedia.org/wiki/Trigonometry\nhttp://en.wikipedia.org/wiki/Trigonometric_identity\nhttp://en.wikipedia.org/wiki/List_of_integrals_of_trigonometric_functions\n\nMathworld - outstanding but suffers from "too much information" syndrome, has esoteric stuff mixed in with the basics\nhttp://mathworld.wolfram.com/topics/Trigonometry.html\nhttp://mathworld.wolfram.com/topics/TrigonometricFunctions.htmlhttp://mathworld.wolfram.com/topics/TrigonometricIdentities.html\n\nBooks of tables or the reference sections of trigonometry books are very good too.