Evaluate Without Using a Calculator by Using Ratios in a Reference

question 106

Multiple Choice

Evaluate without using a calculator by using ratios in a reference triangle.
- $$\sin \frac { 5 \pi } { 6 }$$

• A) \(- \frac { \sqrt { 2 } } { 2 }\)
• B) \(\frac { \sqrt { 3 } } { 2 }\)
• C) \(\frac { 1 } { 2 }\)
• D) \(- \frac { \sqrt { 3 } } { 2 }\)

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