Question

(x cos x) + (sin x)oos /​

Answer 1

Step-by-step explanation:

f(x)=xcosx−sinx

f

′

(x)=−xsinx

f

′

(x)=0⇒x=0,π

f

′′

(x)=−xcosx−sinx

f

′′

(π)=−π<0

Hence, f has a maxima at x=π

Answer 2

Answer:

hope this will help you.