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 ...
In this instance we can say that the roots occur when the cosine of the angle is zero. To solve an equation of the form\(a\cos x + b\sin x = c\)you must always rewrite the left hand side into one ...
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