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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.

  3. Proofs of trigonometric identities - Wikipedia

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

    Trigonometric functions specify the relationships between side lengths and interior angles of a right triangle. For example, the sine of angle θ is defined as being the length of the opposite side divided by the length of the hypotenuse.

  4. Congenital adrenal hyperplasia due to 21-hydroxylase deficiency

    en.wikipedia.org/wiki/Congenital_adrenal...

    The first questions about assignment were raised in the early 1980s when Money and others reported an unexpectedly high rate of failure to achieve normal adult sexual relationships (i.e., heterosexual orientation, marriage, and children) in grown women with CAH (though all had female gender identities).

  5. Trigonometry - Wikipedia

    en.wikipedia.org/wiki/Trigonometry

    Trigonometry (from Ancient Greek τρίγωνον (trígōnon) 'triangle' and μέτρον (métron) 'measure') [1] is a branch of mathematics concerned with relationships between angles and side lengths of triangles.

  6. Sine and cosine - Wikipedia

    en.wikipedia.org/wiki/Sine_and_cosine

    In mathematics, sine and cosine are trigonometric functions of an angle.The sine and cosine of an acute angle are defined in the context of a right triangle: for the specified angle, its sine is the ratio of the length of the side that is opposite that angle to the length of the longest side of the triangle (the hypotenuse), and the cosine is the ratio of the length of the adjacent leg to that ...

  7. Comparison of Q&A sites - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_Q&A_sites

    Yahoo! Answers: 2005: 2021: All topics: 13 languages: Contributions owned by the author. Yahoo retains rights to the use, distribution or modification. [12] No Zhihu: 2011 — Many topics: Chinese and a few others: Owned and operated by the original authors. Yes, except to view answers of questions when directed from search engine

  8. File:Sohcahtoa.svg - Wikipedia

    en.wikipedia.org/wiki/File:Sohcahtoa.svg

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Donate; Pages for logged out editors learn more

  9. Brief Answers to the Big Questions - Wikipedia

    en.wikipedia.org/wiki/Brief_Answers_to_the_Big...

    Brief Answers to the Big Questions is a popular science book written by physicist Stephen Hawking, and published by Hodder & Stoughton (hardcover) and Bantam Books (paperback) on 16 October 2018. The book examines some of the universe 's greatest mysteries, and promotes the view that science is very important in helping to solve problems on ...