Quadrantal and Reference Angles

What is the reference angle for -30°?

• 150°

• 30°

• 80°

• 60°

What is the reference angle for 240°?

• 60°

• 30°

• 45°

• 210°

Convert 270^o into radians

• π/ 4

• 3π/ 2

• 3π/ 4

• π/ 2

What is the reference angle for 2pi/3

• pi/4

• 7pi/6

• 4pi/3

• pi/3

Formula [Reference angle = Actual angle - 180] is for

• quadrant 1

• quadrant 2

• quadrant 3

• quadrant 4

Find the reference angle of 420⁰

• 25

• 50

• 400

• 60

sin 90°

• 1
• 0
• -1
• UD

cos 270°

• 1

• 0

• -1

• UD

tan 180°

• 1
• 0
• -1
• UD

sin 0°

• 1

• 0

• -1

• UD