Welcome Back

Sign in to your PART66Online account

One click — no password needed

or use email
Forgot password?

Don't have an account? Register here

Sample Quiz

Try it out - no subscription required

Question 1 of 10
Correct: 0 Wrong: 0 Remaining: 10
Q1

What is the value of sin(180)?

A 0, because at 180 degrees the point is at (-1, 0) on the unit circle, and sine equals the y-coordinate which is 0
B 1, because sin reaches its peak at 180 degrees which is at the top of the sine wave giving maximum value of 1 here
C -1, because at 180 degrees sine is at the opposite of its starting value, giving -1 as the reversed value of sin 0
Read in Notes
Report an Issue

If possible, provide proof (link to book page, etc.)

Discuss with Community

We use essential cookies to keep you signed in, plus anonymous analytics to understand how the site is used. Cookie-based analytics is set only with your consent. See our Privacy & Cookie Policy.