Find the exact circular function value.
-$\sec \frac { 5 \pi } { 4 }$
A) $- \frac { 2 \sqrt { 3 } } { 3 }$
B) $\frac { \sqrt { 2 } } { 2 }$
C) $- 2$
D) $- \sqrt { 2 }$

Question

Quizplus · Accepted Answer

The secant function is the reciprocal of the cosine function. At $ \frac { 5 \pi } { 4 }$, the cosine value is $- \frac { \sqrt { 2 } } { 2 }$, so the secant value, being its reciprocal, is $- \sqrt { 2 }$.

Find the Exact Circular Function Value sec⁡5π4\sec \frac { 5 \pi } { 4 }sec45π​

Find the Exact Circular Function Value $\sec \frac { 5 \pi } { 4 }$