### Some articles on *cosines, cosine*:

Law Of

... A version of the law of

**Cosines**- Law of**Cosines**in Non-Euclidean Geometry... A version of the law of

**cosines**also holds in non-Euclidean geometry ... C with opposite sides a, b, c then the spherical law of**cosines**asserts that each of the following relationships hold In hyperbolic geometry, a pair of equations are collectively known as the hyperbolic ... sinh and cosh are the hyperbolic sine and**cosine**, and the second is Like in Euclidean geometry, one can use the law of**cosines**to determine the angles A, B, C from the knowledge of the sides a, b, c ...Jamshīd Al-Kāshī - Mathematics - Law of

... In French, the law of

**Cosines**... In French, the law of

**cosines**is named Théorème d'Al-Kashi (Theorem of Al-Kashi), as al-Kashi was the first to provide an explicit statement of the law of**cosines**...Spherical Law Of

... In spherical trigonometry, the law of

**Cosines**... In spherical trigonometry, the law of

**cosines**(also called the**cosine**rule for sides) is a theorem relating the sides and angles of spherical triangles, analogous to the ordinary law of**cosines**... to w), and the angle of the corner opposite c is C, then the (first) spherical law of**cosines**states Since this is a unit sphere, the lengths a, b, and c are simply equal to the angles (in radians ... then and one obtains the spherical analogue of the Pythagorean theorem A variation on the law of**cosines**, the second spherical law of**cosines**, (also called the ...Hyperbolic Law Of

... In hyperbolic geometry, the law of

**Cosines**... In hyperbolic geometry, the law of

**cosines**is a pair of theorems relating the sides and angles of triangles on a hyperbolic plane, analogous to the planar law of**cosines**from ... Christian Houzel (page 8) indicates that the hyperbolic law of**cosines**implies the angle of parallelism in the case of an ideal hyperbolic triangle When α = 0, that is when the ...Cosec(x) - Properties and Applications - Law of

... The law of

**Cosines**... The law of

**cosines**(also known as the**cosine**formula or**cosine**rule) is an extension of the Pythagorean theorem or equivalently, In this formula the angle at C is opposite to the side c ... The law of**cosines**can be used to determine a side of a triangle if two sides and the angle between them are known ... It can also be used to find the**cosines**of an angle (and consequently the angles themselves) if the lengths of all the sides are known ...