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  1. Unit circle (video) | Trigonometry | Khan Academy

    Learn how to use the unit circle to define sine, cosine, and tangent for all real numbers.

  2. DNA function & structure (with diagram) (article) | Khan Academy

    Ribose instead of deoxyribose is drawn in the dehydration synthesis diagram. It says "The nucleotides forming each DNA strand are connected by noncovalent bonds, called hydrogen …

  3. Circles | Geometry (all content) | Math | Khan Academy

    Unit 14: Circles About this unit Explore, prove, and apply important properties of circles that have to do with things like arc length, radians, inscribed angles, and tangents.

  4. The complex plane (article) | Khan Academy

    Imagine a big circle with 2 small circles inside it that don't intersect with each other, that would be the set of the Complex number (big circle) and the Real and Imaginary sets (small circles).

  5. Two-way frequency tables and Venn diagrams - Khan Academy

    One way to do it is using a Venn diagram. So let me draw a Venn diagram. So Venn diagram is one way to represent it. The way it's typically done, the convention, is that you would make a …

  6. Labeling parts of a circle (video) | Khan Academy

    Radius, diameter, center, and circumference--all are parts of a circle. Let's go through each and understand how they are defined.

  7. Sine & cosine identities: periodicity (video) | Khan Academy

    Sal finds trigonometric identities for sine and cosine by considering angle rotations on the unit circle.

  8. Circles | High school geometry | Math | Khan Academy

    About this unit Explore, prove, and apply important properties of circles that have to do with things like arc length, radians, inscribed angles, and tangents.

  9. Graph of y=tan(x) (video) | Trigonometry | Khan Academy

    Sal draws the graph of the tangent function based on the unit circle definition of the function.

  10. Cell parts and functions (article) | Khan Academy

    Cell diagrams showing a typical animal cell and plant cell. Image created with Biorender.com.