Trig Functions for Angles

If θ is an angle in standard position and r = √(x²+ y²), cos θ = __

• x/r
• y/r
• r/x
• y/x

If θ is an angle in standard position and r = √(x²+ y²), sec θ = __

• x/r
• y/r
• r/x
• y/x

If θ is an angle in standard position and r = √(x²+ y²), tan θ = __

• x/r

• y/r

• r/x

• y/x

If θ is an angle in Quadrant I, which trig ratios will be positive

• sin θ
• cos θ
• tan θ
• All the above (sin θ, cos θ, tan θ)

If θ is an angle in Quadrant IV, which trig ratios will be positive

• sin θ
• cos θ
• tan θ
• cos θ and tan θ

If θ is an angle in Quadrant II, which trig ratios will be positive

• sin θ
• cos θ
• tan θ
• cos θ and sin θ

If θ is an angle in Quadrant III, which trig ratios will be positive

• sin θ
• cos θ
• tan θ
• sin θ, cos θ, tan θ

If θ is an angle in standard position and r = √(x²+ y²), sin θ = __

• x/r
• y/r
• r/x
• y/x

Let (-4, 3) be a point on the terminal side of θ.  Which of the following is FALSE?

• cos θ = -4/5
• tan θ = -3/4
• sin θ = 3/5
• cos θ = 4/5

Let (-4, 3) be a point on the terminal side of θ.  What is tan θ?

• -4/5
• -3/4
• 3/5
• 4/5