Pythagorean identities

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• Pythagorean trigonometric identity — The Pythagorean trigonometric identity is a trigonometric identity expressing the Pythagorean theorem in terms of trigonometric functions. Along with the sum of angles formulae (see Angle sum and difference identities) it is the basic relation… …   Wikipedia

• Pythagorean theorem — See also: Pythagorean trigonometric identity The Pythagorean theorem: The sum of the areas of the two squares on the legs (a and b) equals the area of the square on the hypotenuse (c) …   Wikipedia

• Proofs 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… …   Wikipedia

• List of trigonometric identities — Cosines and sines around the unit circle …   Wikipedia

• Trigonometric functions — Cosine redirects here. For the similarity measure, see Cosine similarity. Trigonometry History Usage Functions Generalized Inverse functions …   Wikipedia

• Sine — For other uses, see Sine (disambiguation). Sine Basic features Parity odd Domain ( ∞,∞) Codomain [ 1,1] P …   Wikipedia

• Pell number — In mathematics, the Pell numbers and companion Pell numbers (Pell Lucas numbers) are both sequences of integers that have been known since ancient times. They are defined by a recurrence relation similar to that for the Fibonacci numbers, and… …   Wikipedia

• Trigonometry — Trig redirects here. For other uses, see Trig (disambiguation). The Canadarm2 robotic manipulator on the International Space Station is operated by controlling the angles of its joints. Calculating the final position of the astronaut at the end… …   Wikipedia

• History of algebra — Elementary algebra is the branch of mathematics that deals with solving for the operands of arithmetic equations. Modern or abstract algebra has its origins as an abstraction of elementary algebra. Historians know that the earliest mathematical… …   Wikipedia

• Fibonacci number — A tiling with squares whose sides are successive Fibonacci numbers in length …   Wikipedia

• Theorem — The Pythagorean theorem has at least 370 known proofs[1] In mathematics, a theorem is a statement that has been proven on the basis of previously established statements, such as other theorems, and previously accepted statements …   Wikipedia