2006-07-11 08:35:55 · 11 answers · asked by Anonymous in Education & Reference ➔ Homework Help
learn the basic ratios thoroughly
sinx=opp/hyp; cosecx=1/sinx=hyp/opp
cosx=adj/hyp; secx=1/cosx=hyp/adj
tanx=opp/adj ; cotx=1/tanx=adj/opp
then the trig identities
sin^2x+cos^2x=1
1+tan^2x=sec^2x
1+cot^2x=cosec^2x
then the compound angles formulas
sin(A+B)=sinAcosB+cosAsinB
cos(A+B)=cosAcosB-sinAsinB
tan(A+B)=(tanA+tanB)/(1-tanAtanB)
then the ratios of multiple and sub multiple angles
sin2x=2sinxcosx
cos2x=cos^2x-sin^2x
tan2x=2tanx/1-tan^2x
sin3x=sin(2x+x)=sin2xcosx+cos2xsinx=2sinxcos^2x+(cos^2x-sin^2x)sinx=3sinx-4sin^3x
cos3x=4cos^3x-3cosx
tan3x=(3tanx-tan^3x)/(1-3tan^2x)
then the tables sin0=cos90=0;sin90=cos0=1;sin30=cos60=1/2;
sin45=cos45=1/2^1/2;sin60=cos30=(3^1/2)/2;
tanx=sinx/cosx
if you are thorough with these basics then it will be a pleasure to do sums in trigs
2006-07-11 17:28:51 · answer #1 · answered by raj 7 · 0⤊ 0⤋
Learn your formulas. Don't waste time looking them up in your book. Practice, Practice, Practice. Try to understand why you are doing any step. Practice (I cannot emphasize this enough)
2016-03-15 22:42:16 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Learn the Unit Circle. That will save you time and time again.
2006-07-11 08:37:48 · answer #3 · answered by Charley 2 · 0⤊ 0⤋
definitly learn the unit circle. at first it's a little hard to understand and memorize. but after you get the basics of it, memorize it. you can use it again and again and again.
also memorize the formula of SOH CAH TOA. it helps!
2006-07-11 09:42:53 · answer #4 · answered by hmm. 2 · 0⤊ 0⤋
there is no easy way... luckily my mom is a math teacher. all i can remember is SOH CAH TOA (Sin Cos Tangent)
2006-07-11 08:38:35 · answer #5 · answered by nothankyou 5 · 0⤊ 0⤋
learn geometry first. actually algebra, then geometry, then trigonometry, then precalc, then calc, then calc 2 and 3 and al the others
2006-07-11 08:37:41 · answer #6 · answered by darpdarp 2 · 0⤊ 0⤋
.Try to find books of principals and study bit by bit using writing and drawing to fix material and test your self by plain examples.Also use imagination which comes by experience
2006-07-11 08:45:48 · answer #7 · answered by Ahmad 4 · 0⤊ 0⤋
if youve already got a good foundation in algebra in geometry, try www.math.com
2006-07-11 08:38:47 · answer #8 · answered by rumilb 4 · 0⤊ 0⤋
http://books.mcgraw-hill.com/getbook.php?isbn=0070068933&template=
2006-07-11 08:42:08 · answer #9 · answered by bobweb 7 · 0⤊ 0⤋
familiarise the sine,cosine&tan.angle values ur done trignomretry is ur playmate
2006-07-11 08:42:19 · answer #10 · answered by subharee s 1 · 0⤊ 0⤋