introduction of trigonometry theory
Answers
Answer:
Step-by-step explanation:
Important Terms for Right-Angled Triangles
Right-angled triangle showing the Opposite, Adjacent and Hypotenuse
The right angle is indicated by the little box in the corner.
The other angle that we (usually) know is indicated by θ.
The side opposite the right angle, which is the longest side, is called the hypotenuse.
The side opposite θ is called the opposite.
The side next to θ which is not the hypotenuse is called the adjacent.
Introducing Sine, Cosine and Tangent
There are three basic functions in trigonometry, each of which is one side of a right-angled triangle divided by another.
The three functions are:
Name Abbreviation Relationship to sides of the triangle
Sine Sin Sin (θ) = Opposite/hypotenuse
Cosine Cos Cos (θ) = Adjacent/hypotenuse
Tangent Tan Tan (θ) = Opposite/adjacent