Trig functions using the unit circle

sinθ is positive in

• the 1st and 2nd quadrants
• the 1st and 3rd quadrants
• the 1st and 4th quadrants
• the 2nd and 3rd quadrants

cosine is positive in

• the 1st and 2nd quadrants

• the 1st and 3rd quadrants

• the 1st and 4th quadrants

• the 2nd and 3rd quadrants

What is the radius of the unit circle?

• 1

• 2

• 0

• I

• II

• III

• IV

Tags

CCSS.HSF.TF.A.2

CCSS.HSF.TF.C.8

What radian measure corresponds to the point on the unit circle?

• π/4

• 3π/2

• 5π/4

• 7π/3

Based on the unit circle, what is the value of sine?

• y

• x

Based on the unit circle, what is the value of cosine?

• y

• x

• csc x
• sec x
• cot x
• tan x

Based on the unit circle, what is the value of tangent?

• 1