Trigonometer 10pc
A trigonometric function generator that provides a hands-on approach to teaching trigonometry.
ZAR 129.00
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Details
The Trigonometer is a trigonometric function generator: a physical device that lets students produce the basic relationships of the sine, cosine and tangent functions and read them to two-digit accuracy. Its purpose is to fill the gap a calculator leaves. A calculator returns a sine value instantly and explains nothing, whereas generating the same relationship by hand shows a student what the ratio actually describes and why it changes as the angle does. The recommended approach is to use manipulative devices like this alongside calculators in teaching basic trigonometry, rather than choosing between them. It is made from high impact styrene and measures 7 x 97 x 0.1 cm, a long, flat instrument designed to be laid on a desk. It suits students from thirteen years, which is where trigonometry usually enters the curriculum.