Exact trigonometric ratios via the exponential form
Exact trigonometric ratios via the exponential form
IB Year 6 | Grade 12
Use complex number methods to find the exact value of \(\cos\dfrac{7\pi}{12}\) and \(\sin\dfrac{7\pi}{12}\).
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Answer:\(\cos\dfrac{7\pi}{12}=\dfrac{\sqrt2-\sqrt6}{4},\ \sin\dfrac{7\pi}{12}=\dfrac{\sqrt6+\sqrt2}{4}\)
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