The equation having null set as its solution set is

A) x = cos x
B) x = e^x
C) x = sin x
D) x = tan x

  B) x = e^x

Step-by-step explanation:

The graphs of y = e^x and y = x never intersect, so the solution set will be the empty (null) set for ...

  x = e^x

_____

There is one intersection of y=x with cos(x) and with sin(x). There are an infinite number of solutions for x = tan(x).

use this formula:

p(a\b) = p(a and b)/p(b).

take it from here.

answer: ur v dumb

step-by-step explanation: