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Unit circle is very useful to find the values of sine, cosine and tangent of angles such as 0, 90º, 180º, 270º or 360º degrees without a calculator.

One can also use equilateral triangle to find the values of sine, cosine and tangent of 30º 60º .

The sine, cosine and tangent of 45º can be found using isosceles right angle triangle.

Proof of some trigonometric identities are also provided.

Examples on how to use the unit circle and exercises on its applications and solutions to the exercises are also included.

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£3.00