Unit_circle_definition_of_sine_cosine_tangent
Learn how the trigonometric ratios are extended to all real numbers using algebra. Start solving simple problems that involve this new definition of the trigonometric functions.
Basic_trigonometric_identities
Learn about very useful trigonometric identities that arise by considering different properties of the unit circle definition.
Learn about radians, which are the official unit of measurement for angles in algebra (in contrast to degrees, which are used in geometry).
Learn how to draw the graph of sinusoidal functions. For example, draw the graph of f(x)=-2*cos(πx)-7.
Learn about the Law of cosines and how to use it in order to find missing side lengths and angles in general triangles.
Prove the Pythagorean trigonometric identity for all real numbers and use it in order to solve problems.
Use the power of trigonometry in order to solve various problems that involve triangles.
Finding_amplitude_midline_from_formula
Learn how to find the amplitude and the midline of the graph of a sinusoidal function from its formula. For example, find the amplitude and the midline of f(x)=3*sin(2x-1)+5.
Trigonometric_values_of_special_angles
Learn how to find the trigonometric values of some special angles without the use of a calculator.
Learn about the Law of sines and how to use it in order to find missing side lengths and angles in general triangles.
Learn how the graphs of y=sin(θ), y=cos(θ), and y=tan(θ) look, using the unit circle definition of the functions.
Constructing_sinusoidal_functions
Learn how to find the formula of a sinusoidal function from its graph or a few selected features. Model real-world situations with sinusoidal functions.
Period_of_sinusoidal_functions
Learn about the period of sinusoidal functions: how it relates to extremum points and the midline, and how to find it from the formula of the function. For example, find the period of f(x)=3*sin(2x-1)+5.
Introduction_to_amplitude_midline_extrema_of_sinusoidal_functions
Learn about very important features of sinusoidal functions: the amplitude and the midline. Learn how they relate to the extremum points of the function.
All video content by Khan Academy is under their license: CC by NC SA
Website created using Khan Academy Static Downloader