Question

If f(x)= a cos(bx + c)+d, then range of f(x) is​

Answer 1

Answer:

f(x)=a cos(bx+c)+d

Range=[d-a,a+d]

Step-by-step explanation:

Range of cos thetha is [-1,1]

Let theta be bx+c

-1 ≤ cos thetha ≤1

-1 ≤ cos(bx+c) ≤1

-a ≤ acos(bx+c) ≤a

-a+d ≤ acos(bx+c)+d ≤ a+d

Range=[d-a,a+d]

hope it helps