Your Apple Messages app is also a calculator - how use it for complex math

The Calculator app on your iPhone (and iPad) is capable of a host of numeric maneuvers. Beyond performing basic and complex ...
BBC

Calculating the area of a triangle using trigonometry - maths quiz

Looking for more revision? There are videos, diagrams and more on calculating the area of a triangle using trigonometry in this National 5 Maths guide. National 5 Maths - Calculating the area of a ...