Use the Half-Angle Formulas to Determine the Exact Value of the Given

question 52

Multiple Choice

Use the half-angle formulas to determine the exact value of the given trigonometric expression. $\cot \frac { 3 \pi } { 8 }$

• A) \(\cot \frac { 3 \pi } { 8 } = \sqrt { 2 } + 1\)
• B) \(\cot \frac { 3 \pi } { 8 } = - \frac { \sqrt { 2 - \sqrt { 2 } } } { 4 }\)
• C) \(\cot \frac { 3 \pi } { 8 } = \sqrt { 2 } - 1\)
• D) \(\cot \frac { 3 \pi } { 8 } = \sqrt { 2 - \sqrt { 2 } }\)
• E)\(\cot \frac { 3 \pi } { 8 } = \frac { \sqrt { 2 + \sqrt { 2 } } } { 4 }\)

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