Find the Exact Value Of $\sin \left( \frac { 19 \pi } { 6 } \right)$

question 72

Short Answer

Find the exact value of $\sin \left( \frac { 19 \pi } { 6 } \right)$ and $\mathrm { cos } \left( - \frac { 5 \pi } { 6 } \right)$ .

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