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Period formula (sin/cos)
p= 2π/ b
period formula (tangent)
π/b
frequency formula
1/p
csc𝜃
1/sin𝜃
sec𝜃
1/ cos𝜃
cot𝜃
1/tan𝜃
tan𝜃
sin𝜃/cos𝜃
cot𝜃
cos𝜃/sin𝜃
odd function
sin(-𝜃)=-sin(𝜃)
even function
cos(-𝜃)=cos(𝜃)
cos(⍺+β)=
cos ⍺ cos β - sin ⍺ sin β
cos(⍺- β)=
cos ⍺ cos β + sin ⍺ sin β
sin(⍺+β)=
sin⍺ cosβ + cos⍺ sinβ
sin (⍺-β)=
sin⍺ cosβ - cos⍺ sinβ
sin(2𝜃)
cos²𝜃 - sin² 𝜃
cos(2𝜃)=
2 cos² 𝜃-1
cos(2𝜃)=
1-2sin²𝜃