Common Errors in

Pupil’s Work on

Trigonometric Ratios

Common Errors in Pupil’s Work on Trigonometric Ratios

Common Errors in Pupil’s Work on Trigonometric Ratios

Common Errors in Pupil’s Work on Trigonometric Ratios

Common Errors in Pupil’s Work on Trigonometric Ratios

Common Errors in Pupil’s Work on Trigonometric Ratios

Common Errors in Pupil’s Work on Trigonometric Ratios

Common Errors in Pupil’s Work on Trigonometric Ratios

Common Errors in Pupil’s Work on Trigonometric Ratios

Summary1. Know the difference between the angle and

the trignometric ratio

Common Errors in Pupil’s Work on Trigonometric Ratios

Summary2. Use simple trignometric ratios as far as

possible

Common Errors in Pupil’s Work on Trigonometric Ratios

Summary3. Know that for sine, both obtuse and acute

angles give the same ratio, but not cos & tan!

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