Cast Diagram Trig. The cast diagram is also called the quadrant rule or the astc diagram. Trigonometry at as a level includes solving trigonometric equations and finding multiple solutions using a cast diagram or graph.
This is called the cast diagram. All you have to remember is that all the trig functions are positive in quadrant 1 and the diagram tells you what is positive. Trigonometry at as a level includes solving trigonometric equations and finding multiple solutions using a cast diagram or graph.
The cast diagram helps us to remember the signs of the trigonometric functions in each of the quadrants.
The cast diagram is also called the quadrant rule or the astc diagram. Let s see if you ve got it. Here i show you how to use the quadrant rule or cast diagram to solve trigonometric equations in different ranges. The other two trig fractions are negative.
