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  2. List of trigonometric identities - Wikipedia

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

    In particular, in these two identities an asymmetry appears that is not seen in the case of sums of finitely many angles: in each product, there are only finitely many sine factors but there are cofinitely many cosine factors. Terms with infinitely many sine factors would necessarily be equal to zero. When only finitely many of the angles are ...

  3. List of free and open-source iOS applications - Wikipedia

    en.wikipedia.org/wiki/List_of_free_and_open...

    This is an incomplete list of notable applications (apps) that run on iOS where source code is available under a free software/open-source software license. Note however that much of this software is dual-licensed for non-free distribution via the iOS app store; for example, GPL licenses are not compatible with the app store. [citation needed]

  4. List of open-source software for mathematics - Wikipedia

    en.wikipedia.org/wiki/List_of_open-source...

    The precise uses and capabilities of these systems differ greatly from one system to another, yet their purpose remains the same: manipulation of symbolic equations. Computer algebra systems often include facilities for graphing equations and provide a programming language for the users' own procedures.

  5. Euler's formula - Wikipedia

    en.wikipedia.org/wiki/Euler's_formula

    Many texts write φ = tan −1 ⁠ y / x ⁠ instead of φ = atan2(y, x), but the first equation needs adjustment when x ≤ 0. This is because for any real x and y , not both zero, the angles of the vectors ( x , y ) and (− x , − y ) differ by π radians, but have the identical value of tan φ = ⁠ y / x ⁠ .

  6. Formula for primes - Wikipedia

    en.wikipedia.org/wiki/Formula_for_primes

    A general theorem of Matiyasevich says that if a set is defined by a system of Diophantine equations, it can also be defined by a system of Diophantine equations in only 9 variables. [8] Hence, there is a prime-generating polynomial inequality as above with only 10 variables. However, its degree is large (in the order of 10 45). On the other ...

  7. Download and install the AOL app on iOS

    help.aol.com/articles/aol-app-downloading-and...

    Learn more about the AOL app and download it from the App Store. The AOL app is available for iOS devices running iOS 12 or newer. Open the App Store on your device. Tap the Search icon. Type "AOL" in the search field. Tap Search. Next to "AOL: News Email Weather Video", tap Get. Enter your Touch ID or Apple ID, if prompted. Tap Open.

  8. Euclid's theorem - Wikipedia

    en.wikipedia.org/wiki/Euclid's_theorem

    If q is not prime, then some prime factor p divides q. If this factor p were in our list, then it would also divide P (since P is the product of every number in the list). If p divides P and q, then p must also divide the difference [3] of the two numbers, which is (P + 1) − P or just 1.

  9. Access AOL Mail on mobile devices

    help.aol.com/articles/aol-mail-mobile-mail

    With the app version of AOL Mail, you'll be able to add accounts, send mail, organize your mailbox, and more on either Android or iOS. Use AOL Mail on an iOS device If you want to use the email app that comes with your iOS device, just add your AOL Mail account through your device's settings .