# Exact Value of Expression

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• March 30th 2009, 04:34 AM
adam456006
Exact Value of Expression
Find the exact value of the expression:

sin(7π/6 - π/3)
• March 30th 2009, 04:48 AM
mr fantastic
Quote:

Originally Posted by adam456006
Find the exact value of the expression:

sin(7π/6 - π/3)

You have $\sin \left( \frac{5 \pi}{6}\right)$ which is equal to $\sin \left( \frac{\pi}{6}\right)$ by symmetry of the unit circle.