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  2. Exact trigonometric values - Wikipedia

    en.wikipedia.org/wiki/Exact_trigonometric_values

    Thus, for example, / = is a constructible angle because 15 is the product of the Fermat primes 3 and 5. Similarly π / 12 = 15 ∘ {\displaystyle \pi /12=15^{\circ }} is a constructible angle because 12 is a power of two (4) times a Fermat prime (3).

  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. Trigonometric functions - Wikipedia

    en.wikipedia.org/wiki/Trigonometric_functions

    In this right triangle, denoting the measure of angle BAC as A: sin A = ⁠ a / c ⁠; cos A = ⁠ b / c ⁠; tan A = ⁠ a / b ⁠. Plot of the six trigonometric functions, the unit circle, and a line for the angle θ = 0.7 radians. The points labeled 1, Sec(θ), Csc(θ) represent the length of the line segment from the origin to that point.

  5. 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.

  6. Proofs of trigonometric identities - Wikipedia

    en.wikipedia.org/wiki/Proofs_of_trigonometric...

    For example, the sine of angle θ is defined as being the length of the opposite side divided by the length of the hypotenuse. The six trigonometric functions are defined for every real number , except, for some of them, for angles that differ from 0 by a multiple of the right angle (90°).

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

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

    Related: 300 Trivia Questions and Answers to Jumpstart Your Fun Game Night What Is Today's Strands Hint for the Theme: "Shape and Bake"? Today's Strands game deals with molds/shapes for a yummy treat.

  8. GM adds over 132,000 heavy duty pickups to recall for ... - AOL

    www.aol.com/gm-adds-over-132-000-132434205.html

    General Motors is adding over 132,000 heavy-duty pickups in the U.S. to a previous recall for tailgate release switches that can short circuit and open the gates while the trucks are in park. The ...

  9. Fantasy football waiver wire: 10 players to add for NFL Week 14

    www.aol.com/fantasy-football-waiver-wire-10...

    We're going a bit out of order this week to highlight Guerendo's outsized importance among all potential free agents. If you can pick him up, do so.