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April 06 2015

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March 01 2015

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sposób na wieczny uśmiech ;)
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15 Keyboard Shortcuts for Lazy People


More here.

 I’mma feel so savvy if I remember any of these.

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21 GIFs That Explain Mathematical Concepts

var imagebase='file://D:/Program Files (x86)/FeedReader/'; 21 GIFs That Explain Mathematical Concepts 15:55 27.08.2014, Maxx, amazing, World Of Technology “Let's face it; by and large math is not easy, but that's what makes it so rewarding when you conquer a problem, and reach new heights of understanding.”

Danica McKellar

As we usher in the start of a new school year, it’s time to hit the ground running in your classes! Math can be pretty tough, but since it is the language in which scientists interpret the Universe, there’s really no getting around learning it. Check out these gifs that will help you visualize some tricky aspects of math, so you can dominate your exams this year.

Solving Pascal triangles:
Use FOIL to easily multiply binomials:

Here’s how you solve logarithms:

Use this trick so you don’t get mixed up when doing matrix transpositions:

What the Pythagorean Theorem is really trying to show you:

Exterior angles of polygons will ALWAYS add up to 360 degrees:

If you’re studying trig, you better get pretty comfortable with circles. Check out this visualization that shows what you’re really looking at when you deal with pi:

If an arc of a circle is the same length as its radius, the resulting angle is one radian:

Visualizing sine (red) on the Y axis and cosine (blue) on the X axis. The relative position of the circle is shown in black:
This shows the same thing, but a bit more simply:

Here’s how sine and cosine apply to triangles:

Cosine is the derivative of sine:

Tangent lines:

Flipped on its side, the shape begins to make more sense:
Converting a function from Cartesian to Polar coordinates:

Drawing a parabola:

The Riemann sum is the approximate area under a curve:


Translating that into 3D, you get a hyperboloid. Believe it or not, it’s made with completely straight lines:

Seriously. You can even make it do this:

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February 28 2015

Najpiękniejsze stacje metra

Arts et Metiers Na stacji Arts et Métiers krzyżują się 3. i 11. linia paryskiego metra. W 1994 r. by uczcić 200 rocznicę otwarcia otwarcia wyższej szkoły technicznej i muzeum Conservatoire national des arts et métiers została ona przebudowana w steampunkowej stylistyce nawiązującej do twórczości Julesa Verne'a
Metro w PetersburguSiedemnasta stacja petersburskiego metra - Awtowo - została otwarta 15 listopada 1955 roku. Dekoracje w jej wnętrzu upamiętniają obronę Leningradu z czasów II wojny światowej i Piotrogrodu z 1919 roku. Wzrok przykuwają bogato zdobione kolumny i żyrandole. Southwark station Stacja Southwark w Londynie powstała w 1999 roku. Jej najciekawszym elementem jest 40-metrowa ściana wykonana z błękitnego szkła. USA NEW YORK TRANSIT HUBStacja Fulton Center w Nowym Jorku została otwarta 12 listopada 2014 roku. Jest częścią projektu zarządu transportu - Metropolitan Transportation Authority - wartego 1,4 miliarda dolarów. Nad budowlą góruje szklana kopuła, która oświetla stację.
źródło: newsweek
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