The sides of right-angled triangles are labelled opposite, hypotenuse and adjacent. Trigonometry explores the relationship between sides and angles in right-angled triangles. The hypotenuse is the ...

An illustration of a magnifying glass. An illustration of a magnifying glass.

Trigonometric Right Triangle The adjacent side of θ of a right triangle cos_H(radians, adj) Trigonometric Right Triangle The hypotenuse of a right triangle cot_A(radians, opp) Trigonometric Right ...

Most trigonometry students look at triangles on a flat surface. However, people from ancient astronomers to modern navigators calculated the arc lengths and angles of triangles on a sphere. They used ...

Please enter a coordinate in this format (x,y) (1,2) theta: 63.43 degrees sine: 4.47/5 cosine: 2.24/5 tangent: 2/1 cosecant: 2.24/2 secant: 2.24/1 cotangent: 1/2 ...

Most trigonometry students look at triangles on a flat surface. However, people from ancient astronomers to modern navigators calculated the arc lengths and angles of triangles on a sphere. They used ...