Question

find the range of function
(i)cos x/3

Answer 1

\[(ii)\frac{ x+2 }{ |x+2| }\]

Answer 2

USE set theory and get to the required answer

Answer 3

for 1) we know that cosine function values lies between -1 to 1, so it is range.
for 2) you will have only 2 sol. i.e. 1 and -1.

Answer 4

thanks