Question

what is trigonometry's formula

Answer 1

Formulas for right triangles. ... If θ is one of the acute angles in a triangle, then the sine of theta is the ratio of the opposite side to the hypotenuse, the cosine is the ratio of the adjacent side to the hypotenuse, and the tangent is the ratio of the opposite side to the adjacent side.
Some of trigonometry formula are:
sin²θ+cos²θ = 1
sec²θ-tan²θ = 1
cosec²θ-cot²θ = 1
hope this helps you...:)

Answer 2

Basic Formulas

By using a right-angled triangle as a reference, the trigonometric functions or identities are derived: sin θ = Opposite Side/Hypotenuse. cos θ = Adjacent Side/Hypotenuse. tan θ = Opposite Side/Adjacent Side. sec θ = Hypotenuse/Adjacent Side.