Special Right Triangle Trig/Reference angles

What is the reference angle for 5pi/4?

• pi/4
• 7pi/4
• pi/6
• pi/3

Tags

CCSS.HSF.TF.B.7

What is the reference angle for 2pi/3

• pi/4
• 7pi/6
• 4pi/3
• pi/3

Tags

CCSS.HSF.TF.B.7

cos(30⁰)

• 1/2
• √3/2
• √2/2
• 0

sin(-120)

• A
• B
• C
• D

cos 135^o

• 1
• -1
• √2/2
• -√2/2

Tags

CCSS.HSF.TF.A.2

cosθ is positive in

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

Tags

CCSS.HSF.TF.A.3

CCSS.HSF.TF.A.4

CCSS.HSF.TF.C.8

sinθ is positive in

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

Tags

CCSS.HSF.TF.A.2

Evaluate: tan(405^o)

• (sqrt 2)/2
• -1
• -(sqrt 2)/2
• 1

What is the reference angle for 11π/6

• π/6
• π/3
• 2π/6
• 5π/6

Tags

CCSS.HSF.TF.B.7

tan 30 degrees

• √3/3
• √3
• 1
• √2/2

Tags

CCSS.HSF.TF.A.2