The Pythagorean theorem states that if we know the length of two sides of a right-angled triangle, we can calculate the length of the other side. is represented by the formula ... or sine or cosine.

Revise using the sine and cosine rules to find a side or angle in a triangle for your National 5 maths exam with Bitesize Scotland interactive practice quizzes covering feedback and common errors.

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 ...

Unfortunately, for many of us the terms sine and cosine (its partner) are associated with memorizing endless formulas in trigonometry class, which makes it hard to appreciate their mathematical ...