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Level 468

Double/Half Angle Identities


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Sinucosv+cosusinv
Sin (u+v)
Sinucosv-cosusinv
Sin (u-v)
Cosucosv-sinusinv
Cos (u+v)
Cosucosv+sinusinv
Cos (u-v)
(Tanu+tanv)/(1-tanutanv)
Tan (u+v)
(Tanu-tanv)/(1+tanutanv)
Tan (u-v)
2sinucosu
Sin 2u
1-2(sin^2)
Cos 2u
(2tanx)/(1-tanx^2)
Tan 2x
Sin x/2
(+ or -)Sqrt [(1-cos)/2]
Cos x/2
(+ or -) Sqrt [(1+cos)/2]
Tan x/2
(1-cos)/sin or (+ or -) sqrt [(1-cosx)/(1+cosu)]