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  2. Mnemonics in trigonometry - Wikipedia

    en.wikipedia.org/wiki/Mnemonics_in_trigonometry

    Signs of trigonometric functions in each quadrant. All Students Take Calculus is a mnemonic for the sign of each trigonometric functions in each quadrant of the plane. The letters ASTC signify which of the trigonometric functions are positive, starting in the top right 1st quadrant and moving counterclockwise through quadrants 2 to 4. [5]

  3. List of trigonometric identities - Wikipedia

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

    A formula for computing the trigonometric identities for the one-third angle exists, but it requires finding the zeroes of the cubic equation 4x 3 − 3x + d = 0, where is the value of the cosine function at the one-third angle and d is the known value of the cosine function at the full angle.

  4. List of mnemonics - Wikipedia

    en.wikipedia.org/wiki/List_of_mnemonics

    To remember the order of taxa in biology (Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species, [Variety]): "Dear King Philip Came Over For Good Soup" is often cited as a non-vulgar method for teaching students to memorize the taxonomic classification of system.

  5. Parts of the US get their first snow of the winter season ...

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    Areas below 7,000 feet could see between 2 to 6 inches of snow, according to the weather service. See photos of the snow-impacted areas Snow falls Thursday, Nov. 21, 2024, in downtown Indianapolis.

  6. Pythagorean trigonometric identity - Wikipedia

    en.wikipedia.org/wiki/Pythagorean_trigonometric...

    Alternatively, the identities found at Trigonometric symmetry, shifts, and periodicity may be employed. By the periodicity identities we can say if the formula is true for −π < θ ≤ π then it is true for all real θ. Next we prove the identity in the range π/2 < θ ≤ π, to do this we let t = θ − π/2, t will now be in the range 0 ...

  7. Russia tells its citizens: avoid travel to the West - AOL

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    Russian and U.S. diplomats say the relationship is worse than at any time since the 1962 Cuban Missile Crisis, when the two Cold War superpowers came closest to intentional nuclear war, due to a ...

  8. Jameis Winston on interceptions: 'Praying for the Lord to ...

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    Jameis Winston set a Cleveland Browns record with 497 passing yards in Monday night's 41-32 loss to the Denver Broncos.. But despite also throwing four touchdown passes, it was his two ...

  9. List of chemistry mnemonics - Wikipedia

    en.wikipedia.org/wiki/List_of_chemistry_mnemonics

    A mnemonic is a memory aid used to improve long-term memory and make the process of consolidation easier. Many chemistry aspects, rules, names of compounds, sequences of elements, their reactivity, etc., can be easily and efficiently memorized with the help of mnemonics. This article contains the list of certain mnemonics in chemistry.

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