double-angle identities
1Proofs of trigonometric identities — are used to show relations between trigonometric functions. This article will list trigonometric identities and prove them.Elementary trigonometric identitiesDefinitionsReferring to the diagram at the right, the six trigonometric functions of… …
2List of trigonometric identities — Cosines and sines around the unit circle …
3Noida double murder case — On May 16, 2008, Aarushi Talwar, a 14 year old Class IX student of Delhi Public School in Noida and the daughter of a successful dentist couple, was found dead with her throat slit in her parents home at Jalvayu Vihar in [Noida, Uttar Pradesh].… …
4Sine — For other uses, see Sine (disambiguation). Sine Basic features Parity odd Domain ( ∞,∞) Codomain [ 1,1] P …
5Binomial theorem — The binomial coefficients appear as the entries of Pascal s triangle. In elementary algebra, the binomial theorem describes the algebraic expansion of powers of a binomial. According to the theorem, it is possible to expand the power… …
6Elliptic coordinates — are a two dimensional orthogonal coordinate system in which the coordinate lines are confocal ellipses and hyperbolae. The two foci F {1} and F {2} are generally taken to be fixed at a and+a, respectively, on the x axis of the Cartesian… …
7Trigonometric functions — Cosine redirects here. For the similarity measure, see Cosine similarity. Trigonometry History Usage Functions Generalized Inverse functions …
8Cissoid of Diocles — construction In geometry, the cissoid of Diocles is a cubic plane curve notable for the property that it can be used to construct two mean proportionals to a given ratio. In particular, it can be used to double a cube. It can be defined as the… …
9trigonometry — trigonometric /trig euh neuh me trik/, trigonometrical, adj. trigonometrically, adv. /trig euh nom i tree/, n. the branch of mathematics that deals with the relations between the sides and angles of plane or spherical triangles, and the… …
10Machin-like formula — In mathematics, Machin like formulas are a class of identities involving pi; = 3.14159... that generalize John Machin s formula from 1706::frac{pi}{4} = 4 arctanfrac{1}{5} arctanfrac{1}{239},which he used along with the Taylor series expansion of …
