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Signs of trigonometric functions in each quadrant. In the above graphic, the words in quotation marks are a mnemonic for remembering which three trigonometric functions (sine, cosine, tangent and their reciprocals) are positive in each quadrant. The expression reads "All Science Teachers Crazy" and proceeding counterclockwise from the upper ...
In geometry, an orthant [1] or hyperoctant [2] is the analogue in n-dimensional Euclidean space of a quadrant in the plane or an octant in three dimensions. In general an orthant in n-dimensions can be considered the intersection of n mutually orthogonal half-spaces. By independent selections of half-space signs, there are 2 n orthants in n ...
Algebraic geometry is a branch of mathematics which uses abstract algebraic techniques, mainly from commutative algebra, to solve geometrical problems. Classically, it studies zeros of multivariate polynomials; the modern approach generalizes this in a few different aspects.
A classical example is the quadrature of the circle (or squaring the circle). Quadrature problems served as one of the main sources of problems in the development of calculus. They introduce important topics in mathematical analysis.
Enjoy a classic game of Hearts and watch out for the Queen of Spades!
The Steelers are headed to the playoffs, but who will they play? Here's a look at Pittsburgh's potential playoff opponents.
Algebra is the branch of mathematics that studies certain abstract systems, known as algebraic structures, and the manipulation of expressions within those systems. It is a generalization of arithmetic that introduces variables and algebraic operations other than the standard arithmetic operations, such as addition and multiplication.
They argued that the law violated their right to free speech under the First Amendment of the U.S. Constitution and that the threat of prosecution prevented them from counseling minors seeking ...
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