equalsign.in

echemistry.in

General Properties of group–15 elements – E-Chemistry

http://echemistry.in/general-properties-of-group15-elements

General Properties of group–15 elements. Group 15 elements consists of following elements. The atoms of group 15 have 5 valence electrons in the outermost shell 2 in s and 3 in p subshell General electronic configuration of this group is ns. Atomic and Ionic Radii. On moving down the group electronegativity decreases because atomic size increases and shielding effect of inner electron shells also increases and it become difficult for a element to attract a electron rather it can easily loose a electron&#...

echemistry.in

Why Do Water Pipes Break In Winter! – E-Chemistry

http://echemistry.in/expansion-of-water-molecules-after-freezing

Why Do Water Pipes Break In Winter! Water molecule is made up of 2 hydrogen and one oxygen atom and it looks like a mickey mouse head with an oxygen molecule and 2 Hydrogen atom as mickey mouse ears. Characteristics of Chemical Reactions. A chemical reaction is a process in which new substances are formed with completely new properties. The substance which reacts in a. OZONE – PROS AND CONS. Why Do Old Books Become Yellow with Time. Variable Oxidation State Shown by Group 15 Element. Use of tea bags.

emaths.in

WHY sin x AND cosec x ARE POSITIVE IN SECOND QUADRANT? – E-Maths

http://emaths.in/why-sin-x-and-cosec-x-are-positive-in-second-quadrant

XII Full Syllabus Test. WHY sin x AND cosec x ARE POSITIVE IN SECOND QUADRANT? जब भ म बच च स प छत ह क sin x. Quadrant म positive क य ह त ह? म और tan x. हम श answer आत ह , Sir, ALL SCHOOL TO COLLEGE OR ADD SUGAR TO COFFEE, etc. क छ ह बच च क इसक सह reason पत ह त ह . Let’s see the exact reason. All trigonometric ratios are positive in first quadrant. Sin and cosec are positive in second quadrant. Tan and cot are positive in third quadrant. Cos and sec are positive in fourth quadrant. Angle between two lines.

emaths.in

E-Maths – E-Maths

http://emaths.in/author/admin

XII Full Syllabus Test. To draw the graph for any function, we need to take some positive and negative values of then find the corresponding values of And make the line or curve by joining the points obtained. (1) Straight Line . (2) Circle where are co-ordinates of centre and is the radius of the circle. (3) Parabola […]. Integrate root cos2x divided by sinx with respect to x. Let Differentiate both sides w.r.t x Let Equating coefficient both sides, we get On solving above equations. Tagged: basic of log.

emaths.in

Integrate root cos2x divided by sinx with respect to x – E-Maths

http://emaths.in/integrate-root-cos2x-divided-by-sinx-with-respect-to-x

XII Full Syllabus Test. Integrate root cos2x divided by sinx with respect to x. Differentiate both sides w.r.t x. Equating coefficient both sides, we get. On solving above equations. Let us consider two digit numbers ab and cd. For example: 23 45 Now, Now, we can try in one step. Integrate limit 0 to two pie (1 divided by 1 plus e to the power sin x) dx. Evaluate : Let Adding equations (1) and. PROPERTIES OF ARITHMETIC PROGRESSIONS. INTEGRATION AS INVERSE PROCESS OF DIFFERENTIATION. Centre of a circle.

emaths.in

CBSE – E-Maths

http://emaths.in/category/cbse

XII Full Syllabus Test. Aspiring students of Class XII appearing for Board Exams should start their revision at least three months ago, so that they can get thorough touch with the each and every lesson of the syllabus. Here are the marking schemes provided for the help of student to utilise time on particular chapter in beneficial way. Marking Scheme of Class XII. Principle of Mathematical Induction. Concept of deriving trigonometry formulae. Equality of complex numbers. Equation of a line.

ephy.in

Science insider – E-Physics

http://ephy.in/category/science-insider

WHAT WOULD HAPPEN, IF THE SUN WERE MADE OF BANANAS! The sun is hot, it is because its enormous weight creates vast gravity putting its core under colossal pressure, just as a bicycle pump gets warm when you pump it, the pump increases the temperature. Enormous pressure leads to enormous temperature. If instead of hydrogen, you get a billion billion billion tons of bananas and […]. Posted in: Science insider. Sun made up of bananas. Magnetic effect of electric current. Ray optics and optical instruments.

emaths.in

OPERATIONS ON SETS – E-Maths

http://emaths.in/operations-on-sets

XII Full Syllabus Test. 1) Union of Sets:. The union of two sets A and B is the set of all the elements which are either in A or in B or in both A and B. It is denoted by. 2) Intersection of Sets:. The intersection of two sets A and B is the set of all the elements which are common to both A and B. It is denoted by. 3) Difference of Two Sets:. Is the set of all those elements of A which are not elements of B. Is the set of all those elements of B which are not elements of A. Let A and B be two sets.

ephy.in

Downloads – E-Physics

http://ephy.in/downloads

1 CBSE XII PHYSICS QP 2016 ANI. Leave a Reply Cancel reply. Your email address will not be published. Required fields are marked *. Magnetic effect of electric current. Ray optics and optical instruments. Correction of spherical aberration. Displacement method to determine the focal length of a convex lens. Images by spherical mirrors. Images formed by spherical mirrors. Number of Images formed by Reflection. Refraction by Prarallel sided slab. Refraction in a prism. Working principle of microscope.

emaths.in

GRAPH OF FUNCTIONS – E-Maths

http://emaths.in/graph-of-functions

XII Full Syllabus Test. To draw the graph for any function, we need to take some positive and negative values of. Then find the corresponding values of. And make the line or curve by joining the points obtained. Are co-ordinates of centre and. Is the radius of the circle. Principle of Mathematical Induction. Angle between two lines. Centre of a circle. Circular system of measurement. Condition for parallelism and perpendicularity of two lines. Equality of complex numbers. Equation of a line.