Differentiating Inverse Trig Functions What are the inverse trigonometric functions? arcsin,?arccos?and?arctan?are functions defined as the inverse functions of sine, cosine and tangent respectivel...
Integrating with Partial Fractions What is meant by partial fractions with quadratic denominators? For?linear?denominators the denominator of the original fraction can be factorised such that the d...
Mean Value of a Function What is the mean value of a function? The?mean value of a function?may be thought of as the ‘average’ value of a function over a given interval For a function f(x),?the mea...
Improper Integrals What are improper integrals? An?improper integral?is a definite integral where one or both of the limits is either: Positive or minus infinity A point where the function is undef...
Adding and Subtracting Volumes Why might I need to add or subtract volumes of revolution? As with the?area between a curve and a line?or the?area between 2 curves, a required volume may be created ...
Volumes of revolution around the x-axis What is a volume of revolution around the?x-axis?? A?solid?of?revolution?is formed when an?area bounded by a function?(and other boundary equations) is rotat...
Edexcel IGCSE Biology: Double Science 復習筆記 3.2.2 Genetic Inheritance Key Definitions A?gene?is a short length of DNA found on a chromosome that codes for a particular?characteristic?(exp...
Edexcel IGCSE Biology: Double Science 復習筆記 3.2.1 DNA & the Genome The Genome The?entire set of the genetic material?of an organism is known as its?genome In 2003, scientists complete...
Edexcel IGCSE Biology: Double Science 復習筆記 3.1.7 Human Sex Hormones Secondary Sexual Characteristics Primary sexual characteristics are present during development in the uterus and are t...
