Circle Trig

Based on your unit circle cos(90^o)=

• 1
• 0
• -1
• 1/2

The unit circle...

• Has center at (1,1)
• Has a circumference of 1
• Has a diameter of 1
• Has a radius of 1

What is the measure of a complete circle in radians?

• π
• 2π
• 1
• 360

cos (π/6)

• √3/2
• √2/2
• 1/2
• 1

Tags

CCSS.HSF.TF.A.2

sin (π/2)

• √3/2
• √2/2
• 1/2
• 1

Tags

CCSS.HSF.TF.A.2

Find an angle coterminal with -32°

• 32°
• 360°
• 328°
• 148°

In which quadrant(s) is sinθ positive?

• I
• II
• I and II
• III and IV

Tags

CCSS.HSF.TF.A.2

Which sketch is 560°?

• A
• B
• C
• D

State the quadrant in which the terminal side of the angle lies: 101°

• I
• II
• III
• IV

Which angle is coterminal to 100º?

• –100º
• 260º
• 460º
• 660º