Calculating Area under the Curve and x- axis

The unit of measurement is in radian : π/2 =1.57 rad ; π =3.14 rad; 3π/2 =4.71 rad ; 2π =6.28 rad

Step 1. Delete conic shape labeled "c" and "d"

Step 2. Delete the text label "Graphing Ellipse Equation..."

Step 3. Enter in input box the equation f(x)=sin(x)

Step 4. Enter in input box integral[f,0,4.71]

Step 5. The integral or area from 0 to 4.71 radian is equal to 1