##### Asked by: Ludmilla Aipperspach

asked in category: General Last Updated: 22nd March, 2020# What is a trigonometric identity?

**trigonometric identities**are equalities that involve

**trigonometric**functions and are true for every value of the occurring variables where both sides of the equality are defined. Geometrically, these are

**identities**involving certain functions of one or more angles.

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In this way, what are the 3 trigonometric identities?

The three main functions in trigonometry are **Sine**, Cosine and **Tangent**. That is our first Trigonometric Identity.

Also Know, how many trigonometric identities are there? Each of the **six trig** functions is equal to its co-function evaluated at the complementary angle. Periodicity of trig functions. Sine, cosine, secant, and cosecant have period 2π while tangent and cotangent have period π.

Additionally, what are trigonometric identities used for?

**Trigonometric identities** like finding the sine of an angle will help when determining how much of a certain material is needed to use in order to construct the building. Other examples of different architecture where **trigonometric identities** are found is cars, desks, and even benches.

What are the 8 trigonometric identities?

**Terms in this set (8)**

- Reciprocal: csc(θ) = csc(θ) = 1/sin(θ)
- Reciprocal: sec(θ) = sec(θ) = 1/cos(θ)
- Reciprocal: cot(θ) = cot(θ) = 1/tan(θ)
- Ratio: tan(θ) = tan(θ) = sin(θ)/cos(θ)
- Ratio: cot(θ) = cot(θ) = cos(θ)/sin(θ)
- Pythagorean: sin costs = $1.
- Pythagorean: I tan = get sic.
- Pythagorean: I cut = crescent rolls.