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Find the exact value of the expression: sin(7π/6 - π/3)

Quote: Originally Posted by adam456006 Find the exact value of the expression: sin(7π/6 - π/3) You have $\displaystyle \sin \left( \frac{5 \pi}{6}\right)$ which is equal to $\displaystyle \sin \left( \frac{\pi}{6}\right)$ by symmetry of the unit circle.