Question

Which functions below have period ?
y = cos x
y = sin x
y = sec x
y = tan x
y = cot x
y = csc x

Answer 1

All of them do. Not all have the same period, though.

Answer 2

the period 2 pi. sorry if you could please explain how to find the period I would greatly appreciate it

Answer 3

for sine and cosine, the general form is

y = A*sin(Bx-C) + D

y = A*cos(Bx-C) + D

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in both cases, the period is T = 2pi/B

Answer 4

so for instance in y = 2*sin(3x-7)

B = 3

Period

T = 2pi/B

T = 2pi/3