Question

tell the correct answer mark you as brainlist​

Answer 1

Answer:

option (A) is correct

reason

f'(x) = cosx- sinx

for max or min

f'(x) = 0

cosx - sinx = 0

sinx = cosx

tanx = 1

x = 45 degree

f''(x) = - cosx - sinx

f''(45) = - sqrt(2)

hence f(x) is max at 45 degree = pie/4