Iunit cirlce4/8/2023 ![]() ![]() We then use our unit circle, with angles in standard position, to find the trig values of common angle measurements. The conversion used for radians and degrees is \(2\pi \text\). They are two different forms of measurement but they can be used to measure the same thing and can be converted between. Think of radians and degrees like centimeters and inches. ![]() Since \(\pi \) is the ratio of a circle’s circumference to its diameter, it makes sense that we use radians most often when working with circles.Īs most of you have heard before, a circle has 360 degrees. Measuring in radians relates the angle to \(\pi \), so \(\pi \) will be in almost every angle measure when measuring in radians. For instance, a right angle has 90 degrees, a straight angle has 180 degrees, and there’s an angle for every number in between.īut there’s actually another way you can measure an angle, and that’s by measuring in radians. Most of the time, when you measure an angle, you measure it in degrees. This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.Hi, and welcome to this review of the unit circle! In this video, we will go over what the unit circle is and what it is used for.īefore we get into the unit circle itself, let’s talk about degrees and radians. Previous Lesson Table of Contents Next Lesson
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