Chapter 6 - The Circular Functions and Their Graphs - Chapter 6 Test Prep - Review Exercises - Page 645: 41

$$1.9512$$

$$\eqalign{ & \sec 7.3159 \cr & {\text{Use the reciprocal identity }}\sec \theta = \frac{1}{{\cos \theta }} \cr & \sec 7.3159 = \frac{1}{{\cos 7.3159}} \cr & {\text{Using a calculator into radian mode we obtain}} \cr & \sec 7.3159 \approx \frac{1}{{0.512489}} \cr & \sec 7.3159 \approx 1.9512 \cr} $$