θ is a Greek letter and θ is a symbol in mathematics, which is often used to represent angles.

0 & ltθ& lt； When π/4, both sinθ and tanθ are greater than 0, while tanθ=sinθ/cosθ, cos θ < 1, so sinθ.

Lowercase θ means different things in different fields.

1, which often represents the angle of a plane in mathematics.

2. In the International Phonetic Alphabet, it means the consonant silent tooth fricative sound.

3. Cyrillic? It's from Sita.

It is also a symbol of Earth Day.

Greek alphabet reading:

α α: α α

ββ:ββ

γγ:γγ

δ δ: δ Delta

εε:εε

ζ ζ: Jetta Zeta

ε η: Itaeta

θ θ: West Tower θ