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# rktpro

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1. ## All Humans have to 99% the same DNA

From where you got the 99% fact? It is though right that humans have same genetic composition and hence fairly similar and not identical DNA structure.
2. ## Division by zero in a unique way

I came across a formula derived by Ankur Tiwari, which he says enables division by zero. The website claims This formula enables us to divide in a unique way without using denominator. This formula is based on the principle that, If the value of X divided by Y (X/Y) is A than by using this formula we can find out A without dividing X by Y directly, that means without dividing X by Y we can find out its value. This is the reason why ‘Bhartiya New Rule for Fraction’ is capable of diving by Zero. The interesting points in regard of this formula are :- 1.‘Bhartiya New Rule for Fraction’ is based on present phenomenon and rules of mathematics. 2. It is very simple and easy formula. 3.Greatest benefit of ‘Bhartiya New Rule for Fraction’ is that it is capable of dividing by Zero and giving its value as an integer. 4.‘Bhartiya New Rule for Fraction’ can be used to find out the value of four not defined trigonometric ratios tan90, cosec0, sec90, cot0. So that these values can be utilized in the field of astronomy and other fields related to mathematics. 5.If in place of simple division (X/Y), ‘Bhartiya New Rule for Fraction’ is used in any digital electronic device as its processing command for division in processor, it will results in permanently elimination of ‘divide by Zero’ error from that device. How would it affect mathematics? Is there a fallacy in there? Let us discuss...
3. ## Why aren't women into pornography as much as guys?

This is not always the case. Porn producers know that females too watch porn. You are just narrowing the largest earning industry.
4. ## calcuim carbonate

The second question itself is a hint to the first one.
5. ## preventing clotting of blood

Thou shall not take thy neighbor's blood.
6. ## How does a person get expert status?

But you would have to present it to all the powerful and dictator like people who are experts here and bow before them.
7. ## 8th grade homework

I was asking about the text in bold in the quote box-<br class="Apple-interchange-newline">
8. ## rktpro

Who here challenges swansont's rep point record?

1. What's the record?

2. 1952 points

3. seems low to me too

9. ## 8th grade homework

Where you got that from?
10. ## User Reputation System

Yes, everyone would be derailing the discussion and abusing those who gave negative. But, it can be highly insightful for some to know who agree with them and who not.
11. ## Mathematics Books

I am not looking for reference books currently but full text books type. But, Thanks!
12. ## Why aren't women into pornography as much as guys?

I know about an old philosopher who wrote about 'how to live' and all, wrote that females have sexual desires 8 times that of males!

14. ## Mathematics Books

I am looking for books which are not just typical math. books by just giving least theory and difficult exercise. I am looking for a book that develops the real thinking ability and along with it covers problem soling skills by providing interesting questions. If you know about a book covering only one or two chapters of the following list, I will still love to read that. Syllabus PERMUTATIONS AND COMBINATIONS Fundamental principle of counting. Permutations and Combinations, derivation of formulae and their connections and simple applications. MATHEMATICAL INDUCTION Principle of Mathematical Induction and its simple applications. BINOMIAL THEOREM AND ITS SIMPLE APPLICATIONS Binomial theorem for positive integral indices, general term and middle term, properties of Binomial coefficients and simple applications. SEQUENCES AND SERIES Arithmetic and Geometric progressions, insertion of arithmetic, geometric means between two given numbers. Relation between A.M. and G.M. Sum upto n terms of special series n, n2, n3. Arithmetico - Geometric sequence. TRIGONOMETRY Trigonometric functions. Trigonometrical identities and equations. Inverse Trigonometric functions, their properties and applications. COMPLEX NUMBERS AND QUADRATIC EQUATIONS Complex numbers as ordered pairs of reals. Representation of complex numbers in a plane. Argand plane and polar representation of complex numbers. Algebra of complex numbers, modulus and argument (or amplitude) of a complex number, square root of a complex number, triangle inequality. Quadratic equations in real and complex number system and their solutions. Relation between roots and coefficients, nature of roots, formation of quadratic equations with given roots. SETS, RELATIONS AND FUNCTIONS Sets and their representations. Union, intersection and complement of sets and their algebraic properties. Power Set. Relation, types of relations and equivalence relation. One-one, into and onto functions and composition of functions. Real - valued functions, algebra of functions, polynomials, rational, trigonometric, logarithmic and exponential functions, inverse functions. Graphs of simple functions. Even and odd functions. LIMIT, CONTINUITY AND DIFFERENTIABILITY Limit and continuity of a function, limit and continuity of the sum, difference, product and quotient of two functions, L'Hospital rule of evaluation of limits of functions. Differentiability of functions. Differentiation of the sum, difference, product and quotient of two functions. Differentiation of trigonometric, inverse trigonometric, logarithmic, exponential, composite and implicit functions; derivatives of order up to two. Rolle’s and Lagrange’s Mean Value Theorems. Applications of derivatives: rate of change of quantities, monotonic - increasing and decreasing functions, maxima and minima of functions of one variable, tangents and normals. INTEGRAL CALCULUS Integral as an anti-derivative. Fundamental integrals involving algebraic, trigonometric, exponential and logarithmic functions. Integration by substitution, by parts and by partial fractions. Integration using trigonometric identities. Definite Integral as limit of a sum. Fundamental Theorem of Calculus. Properties of definite integrals. Evaluation of definite integrals. Applications of the integrals: determining areas of the regions bounded by simple curves in standard form. DIFFERENTIAL EQUATIONS Ordinary differential equations, their order and degree. Formation of differential equation whose general solution is given. Solution of differential equations by the method of separation of variables. Solution of homogeneous differential equations and linear first order differential equations. CO-ORDINATE GEOMETRY Cartesian coordinate system, distance formula, section formula, locus and its equation, translation of axes, slope of a line, parallel and perpendicular lines, intercepts of a line on the coordinate axes. Straight lines : Various forms of equations of a line, intersection of lines, angles between two lines, conditions for concurrence of three lines, distance of a point from a line, equations of internal and external bisectors of angles between two lines, coordinates of centroid, orthocentre and circumcentre of a triangle, equation of family of lines passing through the point of intersection of two lines. Circles, Conic sections : Standard equation of a circle, general form of the equation of a circle, its radius and centre, equation of a circle when the end points of a diameter are given, points of intersection of a line and a circle with the centre at the origin and condition for a line to be tangent to a circle, equation of the tangent. Sections of a cone, standard equations and properties of conic sections (parabola, ellipse and hyperbola), condition for y = mx + c to be a tangent and point (s) of tangency. THREE DIMENSIONAL GEOMETRY Coordinates of a point in space, distance between two points, section formula. Direction ratios and direction cosines of a line joining two points, angle between two intersecting lines. Coplanar and Skew lines, the shortest distance between two lines. Equations of a line and a plane in different forms, intersection of a line and a plane. VECTOR ALGEBRA Scalars and vectors, addition of vectors, components of a vector in two dimensional and three dimensional spaces, scalar and vector products scalar and vector triple product. MATRICES AND DETERMINANTS Matrices, algebra of matrices, types of matrices, elementary row and column operations. Determinant of matrices of order two and three. Properties of determinants, area of triangles using determinants. Adjoint and inverse of a square matrix. Test of consistency and solution of system of linear equations in two or three variables using inverse of a matrix. STATISTICS AND PROBABILITY Measures of Dispersion: Calculation of mean, median, mode of grouped and ungrouped data. Calculation of standard deviation, variance and mean deviation for grouped and ungrouped data. Probability: Probability of an event, addition and multiplication theorems of probability, Baye’s theorem, probability distribution of a random variable, Bernoulli trials and Binomial distribution. Any help is highly appreciated!
15. ## SFN Classics

Keep going everyone!
16. ## SFN Classics

I have found some but I am not sure if they are classics. I wish you complete the list. Cap'n Refsmmat is a Siriun terrorist An Introduction to New SFN bwahahahah One Year of ScienceForums Best Members 2006
17. ## SFN Classics

Dig your contents people and get us the classics.
18. ## rktpro

Lot of workload today! Tomorrow is the Science exam!

19. ## scattered thoguhts

unless you are not debating!
20. ## Diaphragm

You could make a new post saying 'thank you' and keeping the original post intact.
21. ## SFN Classics

Let us have a collection of SFN classic threads from all the sub-forums. It would nice if you name the link you provide with the topic name itself.
22. ## Ancient Aliens, The Kali Yuga, Science in crisis

Yes, it is based on Uttarayana and Dakshinayana.
23. ## Statistics (math)

Vastor, for standard deviation, as I understand, you have to take any larger mean and subtract all other from it. EDIT: For example, say you take a larger mean x, then the standard deviation for the first frequency would be x-(mean of the frequency)

agreed
25. ## " I`m the Alpha & Omega " Revelation 22:13

Sri Caitanya Mahaprabhu's original teachings have always proved devotion to be the ultimate path. And even those who debated about the shastras were not liked by him.
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