SOHCAHTOA
, , . Label the sides relative to the angle first.
Use the inverse to find an angle
Given two sides, find the angle with or of the ratio.
Drawn from real examiner reports.
Picking the wrong ratio by mislabelling opp/adj/hyp
Choosing cosine when sine is needed (or vice versa) because the sides were labelled wrongly relative to the angle.
Rearranging the equation incorrectly
Dividing when you should multiply (or vice versa) when the unknown is in the denominator.
Calculator left in the wrong angle mode
Working in gradians or radians instead of degrees gives wrong values.
Check your calculator is in DEG and don't round early
Keep full accuracy until the end; premature rounding costs the accuracy mark.
Relative to the angle: opp (opposite), adj (next to it), hyp (opposite the right angle). Then
Which side is the hypotenuse for trig?
In a right-angled triangle the hypotenuse is cm and one angle is . Find the length of the side opposite the angle.
