cotθ=
csc²θ
1/tanθ
cosθ/sinθ
secθ=
1
sec²θ
1/cosθ
cosθ=
1/sinθ
1+cot²θ
tanθ=
1+tg²θ=
senθ/cosθ
1/secθ
1+tan²θ=
sin²θ+cos²θ=
cscθ=