By giving a counter example, show that the following statements are not true.(i) p: If all the angles of a triangle are equal, then the triangle is an obtuse angled triangle.(ii) q: The equation `x^2-1=0`does not have a root lying between 0

Explanation

(i) here p: all angles of a triangle are equal.
q : triangle is obtuse angled triangle.
all angles of `Delta` are equal then each angle will be `60^@`. Therefore , p is true then q is false.
`therefore` given statement is not true.
(ii) we prove it by a counter example. for htis we need such value which is the root of the equation and it does not lie between 0 and 2.
`x=-1` is a root of this equation and it does not lies between 0 and 2.
therefore, given statement is not true.