4. Graphs of tan, cot, sec and csc - Interactive Mathematics - Learn math while you play with it!
4. Graphs of tan, cot, sec and csc by M. Bourne The graphs of `tan x`, `cot x`, `sec x` and `csc x` are not as common as the sine and cosine curves that we met earlier in this chapter. However, they do occur in engineering and science problems. They are ....