O Level Maths Notes: Simple Trigonometry – Finding Sides of Right Angled Triangles
Simple trigonometry can be used with right angled triangles to a side given a side and one of the interior angles other than the right angle,
With the sides of the triangle as labelled above, we can use one of the formulae:
Example: If we have
and
and
want to find
For the triangle above, we haveandand
want to findThis
means we use
Example: If we haveandand
want to find
For the triangle above, we haveandand
want to findThis
means we use
Example: If we haveand
and
want to find
For the triangle above, we haveandand
want to findThis
means we use