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  2. Sides of an equation - Wikipedia

    en.wikipedia.org/wiki/Sides_of_an_equation

    The two sides have the same value, expressed differently, since equality is symmetric. [ 1 ] More generally, these terms may apply to an inequation or inequality ; the right-hand side is everything on the right side of a test operator in an expression , with LHS defined similarly.

  3. List of trigonometric identities - Wikipedia

    en.wikipedia.org/wiki/List_of_trigonometric...

    However, the discriminant of this equation is positive, so this equation has three real roots (of which only one is the solution for the cosine of the one-third angle). None of these solutions are reducible to a real algebraic expression , as they use intermediate complex numbers under the cube roots .

  4. Left and right (algebra) - Wikipedia

    en.wikipedia.org/wiki/Left_and_right_(algebra)

    A two-sided property is fulfilled on both sides. A one-sided property is related to one (unspecified) of two sides. Although the terms are similar, left–right distinction in algebraic parlance is not related either to left and right limits in calculus , or to left and right in geometry .

  5. Shift operator - Wikipedia

    en.wikipedia.org/wiki/Shift_operator

    The one-sided shift S acting on ⁠ ⁠ is a proper isometry with range equal to all vectors which vanish in the first coordinate. The operator S is a compression of T −1 , in the sense that T − 1 y = S x for each x ∈ ℓ 2 ( N ) , {\displaystyle T^{-1}y=Sx{\text{ for each }}x\in \ell ^{2}(\mathbb {N} ),} where y is the vector in ⁠ ℓ ...

  6. Identity element - Wikipedia

    en.wikipedia.org/wiki/Identity_element

    [1] [2] For example, 0 is an identity element of the addition of real numbers. This concept is used in algebraic structures such as groups and rings . The term identity element is often shortened to identity (as in the case of additive identity and multiplicative identity) [ 3 ] when there is no possibility of confusion, but the identity ...

  7. Today’s NYT ‘Strands’ Hints, Spangram and Answers for ...

    www.aol.com/today-nyt-strands-hints-spangram...

    In today's puzzle, there are seven theme words to find (including the spangram). Hint: The first one can be found in the top-half of the board. Here are the first two letters for each word: DR. IN ...