Israeli soldiers took a PR photo with a Palestinian grandma and when they were done, they shot her in the head and executed her.
What a sick and deranged country.
Jamshīd al-Kāshī (d. 1429) was a Persian Muslim astronomer and mathematician who provided an explicit statement of the law of cosines suitable for triangulation.
He discovered (sin 3Φ=3sinΦ - 4sin^3Φ) to determine Sin 1°. He also computed 2π to 9 sexagesimal digits.
He developed an iterative method for solving cubic equations, which was not discovered in Europe until centuries later.
Al-Kashi computed sin 1° to nearly as much accuracy as his value for π, which was the most accurate approximation.
In his numerical approximation, he correctly computed 2π to 9 sexagesimal digits in 1424, and he converted this estimate of 2π to 16 decimal places of accuracy. Al-Kashi invented the Plate of Conjunctions, an analog computing instrument.
Al-Kashi also invented the mechanical planetary computer, which he called the Plate of Zones, which could graphically solve a number of planetary problems, including the prediction of the true positions in longitude of the Sun and Moon, and the planets.
This idea that poor innocent women are at risk from their bestial, evil sons is a an inversion of reality
Children are an opressed minority and mother abusing their sons infinitely more common than the reverse