Sine and Cosine ratio

Reason For Learning

Under its simplest definition, a trigonometric function, is one of the many functions that relate one non-right angle of a right triangle to the ratio of the lengths of any two sides of the triangle (or vice versa). By far, the two most important trig functions to remember are sine and cosine.

Learning Intention

This LB shows you how to find an unknown opposite side or hypotenuse in a right triangle using sine and cosine ratios.

Key Vocabulary Terms

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ACMMG223 Level 9

Use similarity to investigate the constancy of the sine, cosine and tangent ratios for a given angle in right-angled triangles