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22 hours ago · Ptolemy's theorem states that the sum of the products of the lengths of opposite sides is equal to the product of the lengths of the diagonals. When those side-lengths are expressed in terms of the sin and cos values shown in the figure above, this yields the angle sum trigonometric identity for sine: sin( α + β ) = sin α cos β + cos α sin ...
22 hours ago · 3D visualization of a sphere and a rotation about an Euler axis (^) by an angle of In 3-dimensional space, according to Euler's rotation theorem, any rotation or sequence of rotations of a rigid body or coordinate system about a fixed point is equivalent to a single rotation by a given angle about a fixed axis (called the Euler axis) that runs through the fixed point.
4 hours ago · Two New Orleans students prove 2,000-year-old Pythagorean Theorem “Blake did not wait for opportunities to come to him, instead he took the initiative to find his own path and sought out his ...
- 24 sec
- Kenny Lopez
22 hours ago · In Pythagorean numerology (a pseudoscience) the number 4 represents security and stability. The number of characters in a canonical four-character idiom. In the NATO phonetic alphabet, the digit 4 is called "fower". In astrology, Cancer is the 4th astrological sign of the Zodiac. Playing cards for 4
