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  2. Angle - Wikipedia

    en.wikipedia.org/wiki/Angle

    Two angles that share terminal sides, but differ in size by an integer multiple of a turn, are called coterminal angles. The reference angle (sometimes called related angle) for any angle θ in standard position is the positive acute angle between the terminal side of θ and the x-axis (positive or negative).

  3. Initial and terminal objects - Wikipedia

    en.wikipedia.org/wiki/Initial_and_terminal_objects

    The dual notion is that of a terminal object (also called terminal element): T is terminal if for every object X in C there exists exactly one morphism X → T. Initial objects are also called coterminal or universal, and terminal objects are also called final. If an object is both initial and terminal, it is called a zero object or null object.

  4. Central angle - Wikipedia

    en.wikipedia.org/wiki/Central_angle

    Angle AOB is a central angle. A central angle is an angle whose apex (vertex) is the center O of a circle and whose legs (sides) are radii intersecting the circle in two distinct points A and B. Central angles are subtended by an arc between those two points, and the arc length is the central angle of a circle of radius one (measured in radians). [1]

  5. Trigonometric functions - Wikipedia

    en.wikipedia.org/wiki/Trigonometric_functions

    Basis of trigonometry: if two right triangles have equal acute angles, they are similar, so their corresponding side lengths are proportional.. In mathematics, the trigonometric functions (also called circular functions, angle functions or goniometric functions) [1] are real functions which relate an angle of a right-angled triangle to ratios of two side lengths.

  6. Law of sines - Wikipedia

    en.wikipedia.org/wiki/Law_of_sines

    In trigonometry, the law of sines, sine law, sine formula, or sine rule is an equation relating the lengths of the sides of any triangle to the sines of its angles. According to the law, ⁡ = ⁡ = ⁡ =, where a, b, and c are the lengths of the sides of a triangle, and α, β, and γ are the opposite angles (see figure 2), while R is the radius of the triangle's circumcircle.

  7. La Niña Still Expected To Emerge; Although Weak, There ... - AOL

    www.aol.com/news/la-ni-still-expected-emerge...

    Cooler-than-average water temperatures in the equatorial Pacific Ocean are still expected to reach the criteria for a weak La Niña by the end of January, according to an updated outlook released ...

  8. US homebuilder confidence at 7-month high in November, survey ...

    www.aol.com/news/us-homebuilder-confidence-7...

    (Reuters) - U.S. homebuilder sentiment rose to a seven-month high in November and expectations for sales in the next six months surged to the highest in about two-and-a-half years after a ...

  9. Mortgage and refinance rates for Dec. 18, 2024: Average ... - AOL

    www.aol.com/finance/mortgage-and-refinance-rates...

    Average mortgage rates edge higher for 30-year and 15-year terms as of Wednesday, December 18, 2024, as the Federal Reserve is set to conclude its final policy session of the year.