Open study

is now brainly

With Brainly you can:

  • Get homework help from millions of students and moderators
  • Learn how to solve problems with step-by-step explanations
  • Share your knowledge and earn points by helping other students
  • Learn anywhere, anytime with the Brainly app!

A community for students.

find local maxima and local minima for the function f(x)=sin x-cos x 0

See more answers at
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

Join Brainly to access

this expert answer


To see the expert answer you'll need to create a free account at Brainly

for this you have to find f'(x)
ok ....cos x + sin x then?

Not the answer you are looking for?

Search for more explanations.

Ask your own question

Other answers:

and then take f'(x)=0
sin x+cos x=0
sinx=-cos x
nw what ?
cos x + sin x = 0 cos x = -sinx
k then ?
why u delete that?
find the value of x
x=-pi/4 isnt it?
no we have to take the value from 0 to 2
then hw ??
take x = 135 degrees
convert it to radians
if x is between 0 to 2pi, then x= 3pi/4 is correct.
k then hw we find local maxima and local minima ?
local only means 'in that interval' , here 0 to 2pi
so what are maxima and minima here ?
so here u'll have only one value , at x=3pi/4 find f(x) when x=3pi/4
also at x=7pi/4 we have only one value so f'(X)= ives 2 values for x isnt it?
f'(X)=0 gives 2 values for x isnt it?
oh yes! i missed that. now its even simpler..... find the second derivate, what u get ?
-sinx +cos x
whats the use of taking second derivative ?
to know which point is max. or min. , u know how ?
is it by substituting 3pi/4 and 7pi/4 in f''(X) and getting the sign to tell which is maxima and minima?
k gt it !!!
yes, if f''(x) > 0 , then max or min ?
ok, good :)
3pi/4 is max other is minima !!
can u check up the answer for the next qn also ?
sure ...
i will post separately

Not the answer you are looking for?

Search for more explanations.

Ask your own question