algebra precalculus - Using unit circle to explain $\cos(0) = 1

We have been taught $\cos(0) = 1$ and $\sin(90) = 1$. But, how do I visualize these angles on the unit circle?

In Exercises 25–32, the unit circle has been divided into eight e

Honors Pre-Calculus] I have a quiz on “Evaluating Trigonometric Values and the Unit Circle” tomorrow and this still hasn't clicked with me! : r/HomeworkHelp

cos0, SAVE 56%

cos0, SAVE 56%

5.2: Unit Circle - Sine and Cosine Functions - Mathematics LibreTexts

Unit Circle Quadrants, Converting, Solving & Memorizing - Lesson

Summary: The Unit Circle and Trigonometric Functions

Solved Use the unit circle (and algebra) to solve each

Solved Using the Unit Circle provided, provide the exact

Unit Circle – Mathematical Mysteries

Solved Use the unit circle below and the appropriate formula

Unit Circle