Q36 of 105 Page 17

Find the values of b for which the function f(x) = sin x – bx + c is a decreasing function on R ?

We have,

f(x) = sin x – bx +c



Given that f(x) is on decreasing function on R


for all x R


⇒ for all x R


⇒ b < for all x R


But the last value of cos x in 1



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