5 classes on this long and challenging part of the course, over 1 hour long each. Covers solving equations using formulae on pages 13-15 of log tables. Trig diagrams including 3-D shapes. Graphs of trig functions, range and period. A very important part of the course, one of the biggest parts of Higher Level Maths. Leaving Cert papers covered, homework plus full solutions at end of each class.