Question

what are the critical points for -2sin2x=-4?

Answer 1

*i already did the deriv. and this is what i got but i don't know what the cri #s of this would be

Answer 2

critical points are when the derivatives is 0 or DNE

Answer 3

i know i got to sin2x=2 but then what do i do after?

Answer 4

you say "the range of sine is \([-1,1]\) so it cannot be 2

Answer 5

oh hm.. then maybe i did something wrong... i just need to look for point of inflection