Quadrants and Trig Functions

Find all quadrants where tanx>0 and cosx>0

• I

• II

• III

• IV

Find all quadrants where cscx>0 and cosx<0

• I

• II

• III

• IV

Find all quadrants where cscx<0 and cosx<0

• I

• II

• III

• IV

What is the acronym used to help determine the sign of trig functions?

• Please Excuse My Dear Aunt Sally

• SOH-CAH-TOA

• All Students Take Calculus

• FOIL

sec 3π/2

• 0

• undefined

• 1

• -1

cos 5π/6

• -1/2

• 1/2

• √3/2

• -√3/2

tan 7π/4

• -1

• 1

• √2/2

• undefined

What is cos 60°?

• ½

• ^√3/₂

• ^√2/₂

• 1

What is tan 90°?

• 1
• undefined
• 0
• ½

What are the coordinates of  210° on the unit circle?

• (−√3/2, −1/2)

• (√3/2, −1/2)

• (−√3/2, 1/2)

• (−1/2,−√3/2 )