Learn how to find the six trig functions using coterminal angles

The video tutorial emphasizes the importance of understanding coterminal and reference angles for tests. It explains how to find coterminal angles by adding or subtracting 360 degrees or 2π. The unit circle is introduced to explain coordinate points, and the video demonstrates calculating sine, cosine, and tangent for angles, highlighting undefined values.

What is a coterminal angle?

• An angle that shares the same initial and terminal sides

• An angle that is always between 0 and 90 degrees

• An angle that is always negative

• An angle that is always positive

How do you find a coterminal angle for an angle greater than 360 degrees?

• Multiply the angle by 2

• Add or subtract 360 degrees

• Divide the angle by 2

• Add or subtract 180 degrees

What is the coterminal angle of -450 degrees?

• 180 degrees

• 270 degrees

• 90 degrees

• -90 degrees

What is the sine of -450 degrees?

• 0

• Undefined

• -1

• 1

Why is the tangent of -450 degrees undefined?

• Because the angle is greater than 360 degrees

• Because the y-coordinate is zero

• Because the x-coordinate is zero

• Because the angle is negative