Evaluate sine cosine and tangent for a point on the unit circle

The video tutorial explains how to evaluate sine, cosine, and tangent for a given angle, specifically t = 3π/4. It covers sketching the angle on a unit circle, understanding radians, identifying key points on the unit circle, reflecting points over the Y-axis, and calculating trigonometric functions using these points.

What is the first step when given an angle to evaluate its sine, cosine, and tangent?

• Calculate the sine directly

• Sketch the angle

• Find the tangent

• Memorize the unit circle

How many radians are there in a full circle?

• π radians

• 2π radians

• 3π radians

• 4π radians

What is the terminal side of an angle?

• The angle's reflection

• The starting point of the angle

• The midpoint of the angle

• The point where the angle ends

Which quadrant is the point (-√2/2, √2/2) located in?

• First quadrant

• Fourth quadrant

• Third quadrant

• Second quadrant

What is the sine of an angle equal to on the unit circle?

• The X-coordinate

• The Y-coordinate

• The tangent

• The radius

How do you calculate the tangent of an angle using the unit circle?

• X divided by Y

• Y divided by X

• X plus Y

• Y minus X

What is the cosine of the angle t = 3π/4?

• 0

• √2/2

• -√2/2

• 1