- #1

Dell

- 590

- 0

i am looking for the period of this function,

what i did, and now i see that it is wrong was compared it to zero and looked for any time that

sin3x=0 or cos3x=0

this really did give an answer for every time the function reached 0, but did not take into account that once i get 0+ and once i get 0-, how do i find the period?

what i did

sin3x=0 or cos3x=0

x=K*pi/3 or x=pi/6 + K*pi/3

then i got

T=pi/6

do i need to use trig identities to bring it to a function of just sin or cos?? which identities?