Chapter 3 - Radian Measure and the Unit Circle - Section 3.3 The Unit Circle and Circular Functions - 3.3 Exercises - Page 117: 30

$1.0170$

Step 1: csc$(1.3875)$ is equal to the reciprocal of $sin (1.3875)$. Step 2: Convert the calculator to radian mode. Step 3: Type $\frac{1}{sin (1.3875)}$ into the calculator and press enter. Step 4: $\frac{1}{sin (1.3875)}\approx1.0170$