Skip to main content
Back

Trigonometric Functions on Right Triangles definitions

Control buttons has been changed to "navigation" mode.
1/16
  • Right Triangle
    A geometric figure with one 90-degree angle, used as the basis for defining trigonometric ratios.
  • Hypotenuse
    The longest side in a right triangle, always opposite the right angle and used in trigonometric ratios.
  • Opposite Side
    The side across from a given angle in a right triangle, crucial for calculating certain trigonometric functions.
  • Adjacent Side
    The side next to a given angle in a right triangle, but not the hypotenuse, used in trigonometric ratios.
  • Sine
    A trigonometric function representing the ratio of the opposite side to the hypotenuse for a given angle.
  • Cosine
    A trigonometric function representing the ratio of the adjacent side to the hypotenuse for a given angle.
  • Tangent
    A trigonometric function representing the ratio of the opposite side to the adjacent side for a given angle.
  • SOHCAHTOA
    A mnemonic device summarizing how sine, cosine, and tangent relate to the sides of a right triangle.
  • Cosecant
    A reciprocal trigonometric function, defined as the ratio of the hypotenuse to the opposite side.
  • Secant
    A reciprocal trigonometric function, defined as the ratio of the hypotenuse to the adjacent side.
  • Cotangent
    A reciprocal trigonometric function, defined as the ratio of the adjacent side to the opposite side.
  • Reciprocal Identity
    A relationship where a trigonometric function is expressed as the flipped version of another function's ratio.
  • Inverse Trigonometric Function
    An operation that retrieves an angle from a known trigonometric value, undoing the original function.
  • Arc Function
    An alternate name for inverse trigonometric functions, commonly used to find angles from ratios.
  • Degree Mode
    A calculator setting used when angles are measured in degrees, essential for correct trigonometric calculations.
  • Radian Mode
    A calculator setting used when angles are measured in radians, necessary for certain trigonometric evaluations.