# What is the y-value of cos(x) when x = 0^o? a. -1 b. 0 c. 1/2 d. 1

## Question:

What is the y-value of cos(x) when {eq}\displaystyle{ x=0^\circ }{/eq}?

a. -1

b. 0

c. 1/2

d. 1

## Cosine Function:

The cosine function is one of the trigonometric function that gives the relationship between the angle of the triangle and the sides of the triangle. The graph representing the function {eq}f(x)= \cos x {/eq} gives a sinusoidal graph that has an amplitude range of {eq}[-1,1] {/eq}.

## Answer and Explanation:

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Chapter 11 / Lesson 2In trigonometry, sine and cosine are functions used to study right angles. Learn about graphing sine and cosine, and explore how to do the wave. Review the unit circle, sine wave, cosine wave, period, and amplitude, and understand how these help create the sine and cosine graph.