Question

cos2x=0 [0, pi/2]

Answer 1

cos(2x)=0 ->2x=k*pi +pi/2| KEZ

Answer 2

x=k*pi/2+pi/4

Answer 3

what is k

Answer 4

k is integer ...-1,0,1,2,3,...

Answer 5

but you have to look wich k is possible in your domain

Answer 6

rhat is the general formula

Answer 7

k=0 will lead us to x= pi/4 try othes k's

Answer 8

i am doing mean value theorem... my derivative is 2cos2x and my value i am setting it equal to is 0 ...so 2cos2x=0 on the interval [0, pi/2]...i got to the point of cos2x=0 so how do i chose a k

Answer 9

hello?

Answer 10

dont get it