Solve the problem.
-Find $\cos \frac { \theta } { 2 }$, given that $\cos \theta = \frac { 1 } { 4 }$ and $\theta$ terminates in $0

Question

Solve the problem.
-Find $\cos \frac { \theta } { 2 }$, given that $\cos \theta = \frac { 1 } { 4 }$ and $\theta$ terminates in $0 < \theta < \pi / 2$.
A) $\frac { \sqrt { 6 } } { 4 }$

B) $\frac { \sqrt { 8 - 2 \sqrt { 15 } } } { 4 }$

C) $\frac { \sqrt { 8 + 2 \sqrt { 15 } } } { 4 }$

D) $\frac { \sqrt { 10 } } { 4 }$

Quizplus · Accepted Answer

The Answer of Solve the problem.
-Find $\cos \frac { \theta } { 2 }$, given that $\cos \theta = \frac { 1 } { 4 }$ and $\theta$ terminates in $0 < \theta < \pi / 2$.
A) $\frac { \sqrt { 6 } } { 4 }$

B) $\frac { \sqrt { 8 - 2 \sqrt { 15 } } } { 4 }$

C) $\frac { \sqrt { 8 + 2 \sqrt { 15 } } } { 4 }$

D) $\frac { \sqrt { 10 } } { 4 }$

Solve the Problem cos⁡θ2\cos \frac { \theta } { 2 }cos2θ​

Solve the Problem $\cos \frac { \theta } { 2 }$