Trig Half Angle Identities Flashcards
1
Q
sin(θ/2)
A
+-√((1-cosθ)/2)
2
Q
sin²θ
A
(1-cos2θ)/2
3
Q
cos²θ
A
(1+cos2θ)/2
4
Q
tan(θ/2)
A
+-√(1-cosθ/1+cosθ)
5
Q
cos(θ/2)
A
+-√((1+cosθ)/2)
6
Q
sin²(θ/2)
A
(1 - cosθ)/2
