Tanθ(a+b)=Tana+TanB/1-TanaTanBd
Cosθ(a+b)=CosaCosB-SenaSenbcv
Senθ(a+b)=SenaCosB+CosaSenb
Senθ(a-b)=SenaCosB-CosaSenb
Cosθ(a-b)=CosaCosB+SenaSenb
Tanθ(a-b)=Tana-TanB/1+TanaTanB
Tana=Sena/cosa
Cota=cosa/sena
Tan(-θ)=-tanθ
cot(-θ)=-cotθ
sen(-θ)=-senθ
csc(-θ)=-cscθ
cos(-θ)=cosθ
sec(-θ)=secθ