The trigonometric ratios sine, cosine and tangent are used to calculate angles and sides in right angled triangles. We are now going to extend trigonometry beyond right angled triangles and use it ...
For two right-angled triangles, if an angle (other than the ... The adjacent side divided by the hypotenuse is called the cosine of the angle, and is abbreviated to cos. For a given angle Ɵ ...
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