theta

29 7.7

A letter of the Greek alphabet that people use in math and science

noun
/ˈθeɪtə/

Specialized

: theta

In linguistics, theta roles describe the function of noun phrases in relation to verbs, often using the symbol theta.
theta angle
theta =
sin theta

So this case it would be secant Theta plus tangent Theta.

Autoplay Next

Examples

Medical hypnosis can bring the brain To a class ii theta state, Increasing focus and memory retrieval.

The Cabin Movie (2005)
So this is R, this is Theta, and this is Z.
Using that method, we can now calculate what Theta is probably going to be.
Let's say that we propose this Theta star.
We call this threshold "theta state."

Angel Has Fallen (2019)
We looked at how this, for example, theta waves that are known for memory recall, how do they couple with gamma waves?

After Death (2023)
Focused theta brain activity has been found in mammals and humans under conditions of relaxed alertness.

Academic text (1992)
The conversion table shows that the short form covers the theta range from -2.58 to +2.10 logits.

Academic text (2013)
The barely awake or deeply meditating person's neurons tend to discharge theta waves (4 to 7 cycles per second).

Academic text (2010)
In mathematics, theta (Θ) is often used to represent angles in trigonometric functions.

Compounds

theta wave

Specialized

4 7.7

A slow, low energy brain rhythm that appears when a person is awake but relaxed or drowsy

theta rhythm

Specialized

1 7.8

A slow, low brainwave seen when you are relaxed or drowsy

Surface Forms

theta singular

thetas plural

Etymology

The word theta is the Greek letter Θ/θ and is the 'eighth' letter of that alphabet. Scientists and mathematicians use this short letter to name an angle or an unknown value, so remembering 'theta = the Greek eighth letter' explains why you often see it for angles and variables.