Use the Information Given About the Angle θ, 0 ≤θ $\sec \theta = 4 , \quad 0 < \theta < \frac { \pi } { 2 }$

question 114

Multiple Choice

Use the information given about the angle θ, 0 ≤θ ≤ 2π, to find the exact value of the indicated trigonometric function.
- $\sec \theta = 4 , \quad 0 < \theta < \frac { \pi } { 2 }$
Find $\cos \frac { \theta } { 2 }$ .

• A) \(\frac { \sqrt { 8 - 2 \sqrt { 15 } } } { 4 }\)
• B) \(\frac { \sqrt { 6 } } { 4 }\)
• C) \(\frac { \sqrt { 10 } } { 4 }\)
• D) \(\frac { \sqrt { 8 + 2 \sqrt { 15 } } } { 4 }\)

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