Все публикации

Coin rotation paradox

The angle in a semicircle is a right angle #shorts

Circle theorems - the opposite angles in a cyclic quadrilateral add up to 180° #shorts

Circle theorems - the opposite angles in a cyclic quadrilateral add up to 180°

Why does complex number multiplication cause rotation?

Newton fractal

Why are sin, cos and tan called sin, cos and tan?

Differentiation from first principles, x² example

Differentiation - slope of curve

What is 2 to the power pi?

Similar triangles proof

Cosine rule

Similar triangles

Maclaurin expansion of exponential function

Maclaurin expansions

Newton-Raphson method

Similar shapes

Einstein's proof of Pythagoras theorem

Circle theorems - angle at centre of circle is twice angle at circumference

Negative and fractional exponents

Rules of exponents

Parabola focus and directrix

Circle theorem - two radii form an isosceles triangle

Proof of Pythagoras' theorem