Calculate the following values without using a calculator:

MATHEMATICS · Multi-part · A Level · Mathematics · Trigonometry · Trigonometry

Problem

Calculate the following values without using a calculator: (i)

\sin(-210^\circ)

(ii)

\cos\left(\dfrac{13\pi}{6}\right)

(iii)

\cot\left(\dfrac{13\pi}{6}\right)

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