# Verify that the function x(\theta)= \frac{\pi}{180}\theta converts an angle from degrees to...

## Question:

Verify that the function {eq}x(\theta)= \frac{\pi}{180}\theta {/eq} converts an angle from degrees to radians by plugging in {eq}\theta= 360^\circ. {/eq}

So {eq}\frac{d}{d\theta}(\sin(x(\theta)))= \frac{d}{d\theta}(\sin(\frac{\pi}{180}\theta)) {/eq} would tell us how the sine function is changing, per degree (rather than per radian). Determine {eq}\frac{d}{d\theta}(\sin(\frac{\pi}{180}\theta)). {/eq}

## Measurement of Angle

{eq}{/eq}

An angle has two major units of measurement : degrees and radians.

1. Degrees : One revolution is divided into 360 parts called degrees.

2. Radians : One radian is defined as the angle enclosed by an arc of length equal to that of radius of circle. That is,

$$\displaystyle \theta \text{ (in radians)} = \frac{l}{r} \\$$

The conversion between degrees and radians is given by :

$$\displaystyle 180 \ ^{\circ} = \pi \ radians \\$$

Become a Study.com member to unlock this answer! Create your account

{eq}{/eq}

Given function for conversion from degrees to radians :

$$\displaystyle x(\theta) = \frac{\pi}{180} \theta \\$$

Plugging the angle 360... 