Trigonometry basically deals with the study of the relationship between the sides and angles. Trigonometric functions also known as circular functions can be simply defined as the functions of an angle of a triangle. It means that the relationship between the angles and sides.
The trigonometry angles which are commonly used in trigonometry problems are 0°, 30°, 45°, 60° and 90°.
sin(θ)= opposite/hypotenuse
cos(θ)= adjacent/hypotenuse
tan(θ)= opposite/adjacent
Right Angled Example
Oblique Angled Example