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  2. List of trigonometric identities - Wikipedia

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

    These identities are useful whenever expressions involving trigonometric functions need to be simplified. An important application is the integration of non-trigonometric functions: a common technique involves first using the substitution rule with a trigonometric function, and then simplifying the resulting integral with a trigonometric identity.

  3. Special right triangle - Wikipedia

    en.wikipedia.org/wiki/Special_right_triangle

    Set square shaped as 45° - 45° - 90° triangle The side lengths of a 45° - 45° - 90° triangle 45° - 45° - 90° right triangle of hypotenuse length 1.. In plane geometry, dividing a square along its diagonal results in two isosceles right triangles, each with one right angle (90°, ⁠ π / 2 ⁠ radians) and two other congruent angles each measuring half of a right angle (45°, or ...

  4. Sine and cosine - Wikipedia

    en.wikipedia.org/wiki/Sine_and_cosine

    The chord function was discovered by Hipparchus of Nicaea (180–125 BCE) and Ptolemy of Roman Egypt (90–165 CE). [ 45 ] The sine and cosine functions can be traced to the jyā and koṭi-jyā functions used in Indian astronomy during the Gupta period ( Aryabhatiya and Surya Siddhanta ), via translation from Sanskrit to Arabic and then from ...

  5. “What’s The Most Frugal Thing You Do?” (50 Answers) - AOL

    www.aol.com/lifestyle/people-shared-66-most...

    #30. Getting into sport. All the activities I like doing are free. ... -eat probably 90% of my meals at home ... #45. I take my clothes to the tailor to have repaired if they rip or get a hole.

  6. Russia arrests suspected cartel members, seizes $55 million ...

    www.aol.com/russia-arrests-suspected-cartel...

    Russia said Friday it had arrested suspected members of a Colombian cartel trying to smuggle tens of millions of dollars worth of cocaine into Europe.. The suspects were caught loading 570 ...

  7. Simplification - Wikipedia

    en.wikipedia.org/wiki/Simplification

    Simplification is the process of replacing a mathematical expression by an equivalent one that is simpler (usually shorter), according to a well-founded ordering. Examples include:

  8. Jennifer Aniston, 55, says she keeps her diet in check with ...

    www.aol.com/jennifer-aniston-55-says-she...

    Jennifer Aniston, 55, exercises regularly and keeps her diet in check with the 80/20 rule. The 80/20 rule involves eating healthily 80% of the time and being more lenient during the other 20%.

  9. Mark P. Vergnano - Pay Pals - The Huffington Post

    data.huffingtonpost.com/paypals/mark-p-vergnano

    From November 2011 to December 2012, if you bought shares in companies when Mark P. Vergnano joined the board, and sold them when he left, you would have a -1.4 percent return on your investment, compared to a 15.3 percent return from the S&P 500.