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  1. Khan Academy

    If you're seeing this message, it means we're having trouble loading external resources on our website. If you're behind a web filter, please make sure that the domains *.kastatic.org and …

  2. Reciprocal trig ratios - Khan Academy

    Learn how cosecant, secant, and cotangent are the reciprocals of the basic trig ratios: sine, cosine, and tangent.

  3. Khan Academy

    Sin is the ratio of the opposite side to the hypotenuse, cos is the ratio of the adjacent side to the hypotenuse, and tan is the ratio of the opposite side to the adjacent side. They are often …

  4. Trigonometric ratios in right triangles (article) | Khan Academy

    Learn how to find the sine, cosine, and tangent of angles in right triangles. Skip to main content If you're seeing this message, it means we're having trouble loading external resources on our …

  5. Finding reciprocal trig ratios - Khan Academy

    It tells us that the tangent of an angle is equal to the opposite side over the adjacent side. So given this definition, what is the tangent of A? Well, the opposite side, we already figured out, …

  6. Hypotenuse, opposite, and adjacent (article) | Khan Academy

    In a right triangle, the hypotenuse is the longest side, an "opposite" side is the one across from a given angle, and an "adjacent" side is next to a given angle.

  7. Khan Academy

    It's opposite over adjacent you go to the 30 degree angle because that's what we care about, tangent of 30. tangent of thirty. Opposite is two, opposite is two and the adjacent is two square …

  8. Trigonometric ratios review - Khan Academy

    Hyperbolic Trigonometry: Hyperbolic trigonometry deals with hyperbolic functions like hyperbolic sine (sinh), hyperbolic cosine (cosh), and hyperbolic tangent (tanh). These functions can be …

  9. Graph of y=tan (x) - Khan Academy

    The y-coordinate here is negative square root of two, negative square root of two over two. So what's the tangent? Well, it's going to be your sine over your cosine, which is going to be …

  10. Lesson - Khan Academy

    Find the sine, cosine, and tangent of similar triangles; Use trigonometric ratios to calculate side lengths; Recognize special right triangles and use them to find side lengths and angle …