sec = 1/cos
sec = 1/cos
cot = 1/tan
tan^2 + 1 = sec^2
tan = 1/cot
cot^2 + 1 = csc^2
sin = 1/csc
tan^2 + 1 = sec^2
sin = 1/csc
cos = 1/sec
cos = 1/sec
cot = 1/tan
cot^2 + 1 = csc^2
csc = 1/sin
tan = 1/cot
csc = 1/sin
tan = 1/cot
cot = cos/sin
cos = 1/sec
tan = sin/cos
sin = 1/csc
cot = cos/sin
csc = 1/sin
cot = 1/tan
csc = 1/sin
cot = 1/tan
cos = 1/sec
sin = 1/csc
tan = 1/cot
sec = 1/cos
tan = sin/cos
sec = 1/cos
