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prabhat

Cool goIITian

Posted on 3 May 2012 23:06:16 IST

Topic : PLZ SOLVE

0

2

429

Engineering Entrance , JEE Main

 PLZ REPLY WITH THE ANSWER AND SOLUTION..........WHAT IS THE PERIOD OF THE FUNCTION f(x)+f(x+2) = *f(x+1) ????? 

sathyaram

Blazing goIITian

Posted on 14 Mar 2012 17:41:01 IST

Topic : Ramanujam !

2

5

1206

Engineering Entrance , JEE Main

Ramanujam:                                                                                                                                                                   By age 11, he had exhausted the mathematical knowledge of two college students who were lod

boywholived

Scorching goIITian

Posted on 14 Apr 2012 15:12:15 IST

Topic : PLAY WITH GRAPHS

11

17

1849

Engineering Entrance , GATE

                        PLAY WITH GRAPHS  Please click like and comment the graph which you like.Try to find some relationship between graphs i.e y=x^2 and sin x and (sin x)^2 .Let your mind and brain blossomTell me the graphs that you want to display   Graph for sin(x) -32-30-28-26-24-22-20-18-16-14-12-10-8-6-4-22468101214161820222426283032 -3.5-3-2.5-2-1.5-1-0.50.511.522.533.5 x: 10.5139131y: -0.88622658       Graph for cos(?x)

Mayank Mittal

Cool goIITian

Posted on 23 Apr 2012 12:01:57 IST

Topic : Modern Einstein Theory of Relativity

2

0

1011

Engineering Entrance , GATE

Einstein's Theory of Relativity states that ,  "Agar ek ladke ke haath par kisi ladki ka haath ho to ek ghanta bhi ek minute ki tarah guzarta hai aur agar ek haath ek garam tave pe rakha ho to ek minute bhi ek ghanta ke barabar guzarta hai. "Best Explanation of Albert Einstein's Special Theory of Relativity rate if you like

boywholived

Scorching goIITian

Posted on 22 Apr 2012 17:37:30 IST

Topic : Toughest Problems in The world(must have a look)

2

3

1032

Engineering Entrance , JEE Main

 Source Wikipedia.Don't forget to click like if you find it interestingMillennium Prize ProblemsFrom Wikipedia, the free encyclopedia  This article is about the math prizes. For the technology prize, see Millennium Technology Prize.The seven problems are:The Millennium Prize Problems are seven problems in mathematics that were stated by theClay Mathematics Institute in 2000. As of March 2012, six of the problems remain unsolved. A correct solution to any of the problems results in a US$1,000,000 prize (sometimes called aMillennium Prize) being awarded by the institute. The Poincaré conjecture, the onl

sathyaram

Blazing goIITian

Posted on 13 Mar 2012 18:44:16 IST

Topic : Prove trigo :)

0

0

449

Engineering Entrance , JEE Main

 Prove:   Solution:   

Niladri Chakraborty

Hot goIITian

Posted on 8 Mar 2012 07:15:13 IST

Topic : Proving trigonometric identities.,

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0

781

Engineering Entrance , JEE Main

A Guide to Proving Trig Identities Proving identities is a big part of any trigonometry class (or method of study). Here, you will find a basic method that will work on every problem, an example of how to use it, and additional tips and tricks to save you some time. Essential IdentitiesThe trick to proving trig identities is intuition, which can only be gained through experience. The more basic formulas you have memorized, the faster you will be. The following identities are essential to all your work with trig functions. Make a point of memorizing them. Quotient Identities: tan(x) = sin(x)/cos(x) cot(x) = cos(x)/sin(x) Reciprocal Ident

hemang

Blazing goIITian

Posted on 23 Feb 2012 14:55:28 IST

Topic : an awesome approximation for sines.

2

2

761

Engineering Entrance , JEE Main

for x belongs to 30 to 60 degrees.sin x = 1/2 * ((2x-30)/30)^(1/2)it will give you answer accurate upto 3rd decimal place.not useful for iitjee and other exams.just the beauty of maths!!!    More Related Articles How To Learn Trigonometry Quickly? Basic Properties of LogarithmIntegral 0 to infinity e^(-x2)dx ? Here's a nice trick..ParabolaMATHEMATICS - FEW FORMULAE IN LIMITS 

mannvendra

Cool goIITian

Posted on 23 Feb 2012 20:23:50 IST

Topic : how to solve equation???

1

1

535

Engineering Entrance , JEE Main

1/n sin x = ?  n of 1/n and sin gets dislaced then  si x = 6 lolzzzz

Bharati

Hot goIITian

Posted on 4 Feb 2012 16:42:05 IST

Topic : How To Learn Trigonometry Quickly?

0

1

1356

Engineering Entrance , JEE Main

Trigonometry, a branch of mathematics, basically deals with triangles and angles. Many students think that this subject is difficult to understand. For Beginners,it is essential for a student to believe in himself as well as encourage himself to do excel in this subject. There are some initial the steps  below that will help you to learn Trigonometry quickly.To do excel in trigonometry, you should have good algebra & geometry skills. In algebra, you should  know how to change the subject of equations, how to solve simultaneous equations and should understand linear equations. Besides, Geometry is also close to trigonometry. In this subject, you should

Movin Jain

New kid on the Block

Posted on 2 Jan 2012 19:00:01 IST

Topic : Problems on Permutation And Combination by ANIL VERMA, Ganitaacharya Chandigarh

1

1

1189

Engineering Entrance , GATE

 1. In How many ways selection of 5 letters out of the word " MISSISSIPPI" can be done.2. If all the words which can be formed out of the Word " GIITJEE " are written as the words in Dictionary, Then what is the        Rank of the Word " GIITJEE"3.Find the sum of all the numbers ( 5 Digit ) which can be formed by using the Numbers 0,1,2,3,4,5,6,7.

Parth Chhaparwal

Cool goIITian

Posted on 5 Dec 2011 16:46:34 IST

Topic : I need help in trigonometry

0

1

434

Engineering Entrance , JEE Main

Can someone please prove the following-(sinA + cosA) (1 - sinAcosA) = sin^3 A + cos^3 A

hemang

Blazing goIITian

Posted on 8 Sep 2011 12:21:58 IST

Topic : Trigonometry : Truly difficult Practice Questions. . .

1

2

3602

Engineering Entrance , JEE Main

these are too good question. remember to rate me if you like these. :-) Q) If and are positive integers such that,compute the ordered pair .  Q) Find    y  :  Q) Find the value of   Q) Prove that    Q) Prove that if , then .Q) Calculate  Q) evaluate : Q) evaluate :  Q) Solve the equation  Q) Evaluate:  Q) solve for x where . Q) Find the value of:Q)Prove that : Q) find  Q)Prove that . here Q stands for the set of rational numbers.  source : www.artofproblemsolving.com   

hemang

Blazing goIITian

Posted on 30 Aug 2011 12:01:10 IST

Topic : some pretty tough trigonometry questions. enjoy.......

3

0

3678

Engineering Entrance , JEE Main

time limit : 30 minutes. Q1) 6. If sin x, cos x and tan x are in G.P., then cot6 x –cot2 x =(a) 0 (b) –1(c) 1 (d) Depends on xQ2) Minimum value of 2sin x + 2cos x is equal to(a) 2 1 - root2 (b) 2 1- 1 /root 2(c) 2 root2-1 (d) None of theseQ3) solve for minimum value of x -tan(x+100) = tanx*tan(50+x)*tan(x-50)Q4) find the number of values in [0,2pi] for which sin2x = cos3x has a solution.Q5) find x if cos3x*cos3x + sin3x*sin3x = 0Q6) find the number of solutions of  sinx = x2 + x + 1 Q7) find the interval in which the smallest positive root of tanx - x = 0 lies.Q8) sin4x + cos4x = afind the interval in which a lies for a solution.Q9) find the le

hemang

Blazing goIITian

Posted on 7 Jun 2011 19:52:36 IST

Topic : a great trick for trigonometry

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4

2739

Engineering Entrance , JEE Main

/* Style Definitions */table.MsoNormalTable{mso-style-name:"Table Normal";mso-tstyle-rowband-size:0;mso-tstyle-colband-size:0;mso-style-noshow:yes;mso-style-priority:99;mso-style-qformat:yes;mso-style-parent:"";mso-padding-alt:0in 5.4pt 0in 5.4pt;mso-para-margin:0in;mso-para-margin-bottom:.0001pt;mso-pagination:widow-orphan;font-size:11.0pt;font-family:"Calibri","sans-serif";mso-ascii-font-family:Calibri;mso-ascii-theme-font:minor-latin;mso-fareast-font-family:"Times New Roman";mso-fareast-theme-font:minor-fareast;mso-hansi-font-family:Calibri;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:"Times New Roman";mso-bidi-theme-font:minor-bidi;}Hi there friends, to

hemang

Blazing goIITian

Posted on 12 Jun 2011 20:02:35 IST

Topic : trigonometry : the important formulas

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0

832

Engineering Entrance , JEE Main

 SOME IMP FORMULAES IN TRIGO......AT A GLANCE..1.sin(A+B)=sinAcosB+cosAsinB 2.sin(A-B)=sinAcosB - cosAsinB 3.cos(A+B)=cosAcosB- sinAsinB 4.cos(A-B)=cosAcosB+sinAsinB 5.tan(A+B)=(tanA+tanB)/1- tanA*tanB 6.tan(A-B)=(tanA-tanB)/1+tanA*tanB 7.cot(A+B)=(cotAcotb-1)/(cotB+cotA) 8.cot(A-B)=(cotAcotB+1)/(cotB-cotA) 1.sin(A+B)* sin(A-B)=sin^2A - sin^2B                                  =cos^2B - cos^2A 2.cos(A+B)* cos(A-B)=cos^2A -sin^2B    

edison

Forum Expert

Posted on 29 Apr 2011 11:19:20 IST

Topic : Principal Values of the Inverse Trigonometric Functions

0

0

2111

Engineering Entrance , JEE Main

 Principal Values of the Inverse Trigonometric FunctionsIntroduction to principal values of the inverse trigonometric functions:The inverse trigonometric functions are basically the reverse of the given trigonometric functions ..These are : sin -1 x, cos -1 x , tan -1 x , cosec -1 x , sec -1 x , cot -1 xThe principal values and ranges of different inverse functions are as under : sin -1 : {(y,x)l y = sin x , x [-  ], y  [-1,1]} cos -1 : {(y,x)l y = cos x , x  , y [-1,1]} tan -1 : {(y,x)l y = tan x , x  (- ), y 

edison

Forum Expert

Posted on 29 Apr 2011 11:06:19 IST

Topic : Circular functions 4

0

0

618

Engineering Entrance , JEE Main

 Theorem 7Proof: [Dividing both Numerator and denominator by ]Theorem 8Prove thatProof:Theorem 9Proof:(i) sin[(x+y) + z](ii) cos[(x+y) + z]Dividing (1) by (2), we get  

edison

Forum Expert

Posted on 29 Apr 2011 11:04:28 IST

Topic : Circular functions 3

0

0

570

Engineering Entrance , JEE Main

 Theorem 3Proof:Let n > 0. When n = 0, tan (0p + x) = tan x which is true. The theorem is proved by mathematical induction when n=1, tan (p+x)=tan p=RHS.Let the theorem be true for n = m > 0 then tan(mp + x) = tan pSince the theorem is true for all n = 1, n = m, n = m+1 when m > 0theorem is true for n > 0.Next when n < 0. Let n = -m where m > 0Theorem 4Proof:[Dividing both Numerator and denominator by cosx cosy]Theorem 5Proof: Theorem 6Proof:Theorem 7Proof: [Dividing both Numerator and denominator by ]  

edison

Forum Expert

Posted on 29 Apr 2011 11:02:12 IST

Topic : Circular functions 2

0

0

416

Engineering Entrance , JEE Main

 Circular Functions and Reciprocal Functions   Theorem 1Statement:(i) 1 + tan2 x = sec2x(ii) 1 + cot2 x = cosec2xProof:Consider the following identityDivide by cos2x throughout, thenDivide by sin2x throughout, thenTheorem 2Statement:Proof   

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