Question

(8) Show that f (x) = x - cos x is increasing for
all x.​

Answer 1

Answer:

as you given for all x

for suppose let x belongs to natural numbers

f(30)=30-cos30

      = 30-0.86

      = 29.14

f(60)=60-cos60

      = 60-0.5

       = 59.5

SO IT IS QUIET INCREASING ON INCREASING THE NUMBERS

      HENCE PROVED