Khan Academy
Khan Academy is a nonprofit providing a free, world-class education for anyone, anywhere. Our interactive practice problems, articles, and videos help students succeed in math, biology, chemistry, physics, history, economics, finance, grammar, and many other topics.
Khan Academy provides teachers with data on how their students are doing so they can identify gaps in learning and provide tailored instruction. We also offer free personalized SAT and LSAT practice in partnership with the College Board and the Law School Admission Council.
Our resources have been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy each month.
Want to extend your learning beyond YouTube? Practice what you've just discovered for free: www.khanacademy.org
Движение снаряда | AP Physics | Академия Хана
Экологическая сукцессия | Биология в средней школе | Академия Хана
Нарушения | Биология в средней школе | Академия Хана
Наука об Академии Хана
Khan Academy for Parents
Converting polar and rectangular coordinates | Precalculus | Khan Academy
Applying the rational root theorem | Precalculus | Khan Academy
Graphs of arccos and arcsin | Precalculus | Khan Academy
Identifying reference angles for negative angles in standard position | Precalculus | Khan Academy
Identifying reference angles of positive angles in standard position | Precalculus | Khan Academy
Identifying the foci of an ellipse using the radii | Precalculus | Khan Academy
Interpreting a transformed polynomial function's graph | Precalculus | Khan Academy
Recursive formula for geometric sequence | Precalculus | Khan Academy
Recursive formula for arithmetic sequence | Precalculus | Khan Academy
Using the quotient identities to prove trig identities | Precalculus | Khan Academy
Proving the formula for focal length of an ellipse | Precalculus | Khan Academy
Interpreting key features of polynomial graph applications | Precalculus | Khan Academy
Intro to polynomial synthetic division | Precalculus | Khan Academy
Solving polynomial inequalities in factored form | Precalculus | Khan Academy
Graphing polar coordinates | Precalculus | Khan Academy
Parametric equations for projectile motion | Precalculus | Khan Academy
Solving factored form rational inequalities by testing intervals | Precalculus | Khan Academy
Solving rational inequalities from a graph | Precalculus | Khan Academy
Identifying if a ellipse or hyperbola exists from given key features | Precalculus | Khan Academy
Identifying if a parabola exists from given key features | Precalculus | Khan Academy
Finding oblique asymptotes of a rational function | Precalculus | Khan Academy
Writing the equation of an ellipse from graph | Precalculus | Khan Academy
Estimating an oblique asymptote graphically | Precalculus | Khan Academy
Writing transformation form equations of polynomials from a graph | Precalculus | Khan Academy
Graph a polynomial with transformations | Precalculus | Khan Academy