The trigonometric ratios sine, cosine and tangent are used to calculate angles and sides in right angled triangles. We are now going to extend trigonometry beyond right angled triangles and use it ...

To find the value of \ (Ɵ\), calculate sin⁻¹ or cos⁻¹ or tan⁻¹ of the fraction on the right hand side. sin⁻¹ or cos⁻¹ or tan⁻¹ can usually be inputted on a scientific calculator ...

Depending on what is known about various side lengths and angles of a right triangle, there are two other trigonometric functions that may be more useful: the “ sine function” written as sin ...

In a right angled triangle the three sides are perpendicular, base and hypotenuse, as shown in the image below. There are three main trigonometric functions - Sine θ (sin θ), Cosine θ (cos θ ...

A 3,700-year old Babylonian clay tablet reveals an ancient method of constructing right-angled triangles that makes it the world’s oldest and most accurate trigonometric table.