Trig Ratios of Any Angle

If θ is an angle in Quadrant IV, which trig ratio(s) will be positive

• sin θ

• cos θ

• tan θ

• cos θ and tan θ

Tags

CCSS.HSF.TF.A.4

CCSS.HSF.TF.C.8

If θ is an angle in Quadrant II, which trig ratio(s) will be positive

• sin θ

• cos θ

• tan θ

• cos θ and sin θ

Tags

CCSS.HSF.TF.A.2

CCSS.HSF.TF.A.3

CCSS.HSF.TF.C.8

If θ is an angle in Quadrant III, which trig ratio(s) will be positive

• sin θ

• cos θ

• tan θ

• sin θ, cos θ, tan θ

Tags

CCSS.HSF.TF.C.8

cos 0 =

• 0

• 1

• -1

• undefined

cos π/2 =

• 0

• 1

• -1

• undefined

csc π =

• 0

• 1

• -1

• undefined

cos π =

• 0

• 1

• -1

• undefined

sin 3π/2 =

• 0

• 1

• -1

• undefined

cos 3π/2 =

• 0

• 1

• -1

• undefined

cot 2π =

• 0

• 1

• -1

• undefined