mathswithmuza on Instagram: "Trigonometric functions are mathematical relationships that connect the angles of a triangle with the ratios of its sides. The most common ones are sine, cosine, and tangent, which are defined using right triangles. For example, sine measures the ratio of the side opposite an angle to the hypotenuse, while cosine measures the ratio of the adjacent side to the hypotenuse. These functions are not limited to triangles; they are used to describe patterns of waves, oscill

History | Ancient History on Instagram: "During World War II, Japan’s notorious Unit 731, based in Harbin in northeastern China, carried out some of the most horrific human experiments in modern history under the guise of scientific research. Established by the Imperial Japanese Army in 1935 and commanded by General Shiro Ishii, the unit conducted gruesome biological and chemical warfare experiments on thousands of Chinese civilians and prisoners of war, as well as captured Russians and Koreans.