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  2. Trigonometric functions - Wikipedia

    en.wikipedia.org/wiki/Trigonometric_functions

    Learn about the six trigonometric functions (sin, cos, tan, csc, sec, cot) that relate an angle of a right triangle to ratios of its side lengths. Find out how they are defined, used, and extended in mathematics and science.

  3. Pythagorean trigonometric identity - Wikipedia

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

    Learn how to derive and use the Pythagorean trigonometric identity, which relates the sine and cosine functions to the Pythagorean theorem. See different proofs based on right triangles, unit circle, power series, differential equation and Euler's formula.

  4. Law of cotangents - Wikipedia

    en.wikipedia.org/wiki/Law_of_cotangents

    The law of cotangents is a trigonometric identity that relates the sides and angles of a triangle to the cotangents of half the angles. Learn the statement, proof, and applications of this law, as well as other related identities.

  5. List of trigonometric identities - Wikipedia

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

    Learn about the equalities that involve trigonometric functions and are true for every value of the variables. Find the Pythagorean, reciprocal, reflection, shift, periodicity, angle sum and difference, and Ptolemy identities with examples and proofs.

  6. Mnemonics in trigonometry - Wikipedia

    en.wikipedia.org/wiki/Mnemonics_in_trigonometry

    Learn how to remember trigonometric identities and functions using mnemonics, such as SOH-CAH-TOA and All Students Take Calculus. Find out the signs of trigonometric functions in each quadrant and the sines and cosines of special angles.

  7. Cot analysis - Wikipedia

    en.wikipedia.org/wiki/Cot_analysis

    Cot analysis is a biochemical technique that measures how much repetitive DNA is in a DNA sample. It is used to study genome structure and organization and has also been used to simplify the sequencing of genomes that contain large amounts of repetitive sequence.

  8. Commitments of Traders - Wikipedia

    en.wikipedia.org/wiki/Commitments_of_Traders

    Learn about the weekly report by the CFTC that shows the positions of traders in various futures markets in the U.S. Find out the methodology, purposes and uses of the report, and how to access it online.

  9. Car of Tomorrow - Wikipedia

    en.wikipedia.org/wiki/Car_of_Tomorrow

    Front view of Travis Kvapil's Ford Fusion CoT at Darlington Raceway. On January 11, 2006, NASCAR revealed the Car of Tomorrow, also referred to as the "Car of the Future" during its development, [12] after a five-year design program sparked mainly by the death of Dale Earnhardt Sr. in a final-lap crash during the 2001 Daytona 500.

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