trigonometry

Related Questions

• The angle subtended at the centre of a circle of radius 3 metres by an arc of length 1 metre is equal to

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• The value of $\cos 15{}^\circ -\sin 15{}^\circ $is equal to

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• If a, b, c are the sides and A, B, C are the angles of a triangle $ABC$ , then $\tan \left( \frac{A}{2} \right)$ is equal to

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• $\cos A+\sin (270{}^\circ +A)-\sin (270{}^\circ -A)+\cos (180{}^\circ +A)=$

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• The value of $\cos 12{}^\circ +\cos 84{}^\circ +\cos 156{}^\circ +\cos 132{}^\circ $ is

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