# Exact Value of Expression

• March 30th 2009, 05:34 AM
Exact Value of Expression
Find the exact value of the expression:

sin(7π/6 - π/3)
• March 30th 2009, 05:48 AM
mr fantastic
Quote:

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.