Chapter 7.4, Problem 26E

(a)

To determine

To graph: The following function, $y=\cos x$ over the interval $\left[\frac{-\pi }{2},\frac{\pi }{2}\right]$.

(b)

To determine

To calculate: The definite integral that represents the arc length of the following function, $y=\cos x$ over the interval $\left[\frac{-\pi }{2},\frac{\pi }{2}\right]$.

(c)

To determine

To calculate: The arc length of the following function, $y=\cos x$ in the interval $\left[\frac{-\pi }{2},\frac{\pi }{2}\right]$ by using graphic calculator.