Inverse Trig Functions What are the inverse trig functions? The functions arcsin, arccos and arctan are the inverse functions of sin, cos and tan respectively when their domains are restricted sin ...
Reciprocal Trig Functions What are the reciprocal trig functions? What do the graphs of the reciprocal trig functions look like? The graph of y = secx has the following properties: The y-axis is a ...
Electric Field Strength Definition An electric field is a region of space in which an electric charge “feels” a force The electric field strength at a point is defined as: The electrostatic ...
Quadratic Trigonometric Equations How are quadratic trigonometric equations solved? A quadratic can give up to two solutions You must consider both solutions to see whether a real value exists Reme...
Edexcel IGCSE Chemistry 复习笔记 1.4.1 Periodic Table: Basics Arrangement of the Periodic Table There are over 100 chemical elements which have been isolated and identified Elements are arra...
Representing Electric Fields The direction of electric fields is represented by electric field lines Electric field lines are directed from positive to negative Therefore, the field lines mu...
Edexcel IGCSE Chemistry 复习笔记 1.3.2 Calculate Relative Atomic Mass Calculate Relative Atomic Mass The relative atomic mass of each element is calculated from the mass number and relative abundan...
Coulomb's Law All charged particles produce an electric field around it This field exerts a force on any other charged particle within range The electrostatic force between two charge...
Trigonometric Equations: sinx = k How are trigonometric equations solved? Trigonometric equations can have an infinite number of solutions For an equation in sin or cos you can add 360° or 2π to ea...
