# Trigonometry Topics

**Acute Angle**- A positive angle that is less than 90 degrees.
**Angles**- The inclination of one line to another.
**Cosecant**- Trigonometric function.
**Cosine**- Trigonometric function.
**Cotangent**- Trigonometric function.
**Degree**- A unit describing a plane angle, 1 degree = 1/90 right angle.
**Hyperbolic Sine**- Hyperbolic sine of x.
**Radian**- The radian is the plane angle between two radii of a circle which cut off on the circumference an arc equal in length to the radius.
**Secant**- Trigonometric function.
**Sinc Function**- The function sin of x divided by x.
**Sine**- Trigonometrical function.
**Spherical Trigonometry**- The branch of mathematics dealing with measurements on the sphere.
**Steradian**- The steradian is the solid angle, having its vertex in the centre of a sphere, cuts off an area of the surface of the sphere equal to that of a square with sides of equal length to the radius of the sphere.
**Tangent**- Trigonometric function.
**Trigonometric**- The basic Sum and Difference equations along with other trigonometric functions.
**Trigonometric Functions**- These are functions of an angle. They relate the angles of a triangle to the lengths of its sides.
**Trigonometry Books**- Lists all Trigonometry Books in the Encyclopaedia
**Trigonometry Calculations**- Lists all Trigonometry Calculations in the Encyclopaedia
**Trigonometry Conversions**- Lists all Trigonometry Conversions in the Encyclopaedia
**Trigonometry Weblinks**- Lists all Trigonometry Weblinks in the Encyclopaedia

**Subjects: ** Mathematics