Question

express cos^2 2x in terms of cos 4x

Answer 1

you know the formula for cos2x ?

Answer 2

mhmm cos2x has a few.

Answer 3

in terms of cos^2 x ?

Answer 4

either cos^2 x - sin^2 x or 2cos^2 -1 right?

Answer 5

1+cos 4x is 2cos^2 2x

Answer 6

so just divide by 2 :)

Answer 7

(1+cos 4x )/2

Answer 8

umm. i was getting there aravind. was just making sure he knew the formula. but thats good too.
just follow aravind, akai.

Answer 9

thanks guys! but im a she actually~ XDD

Answer 10

lol XD

Answer 11

ha sorry mam. :P

Answer 12

Anyways Welcome to Openstudy !

Answer 13

No problem Yrehan.. And thanks again Aravin!

Answer 14

*aravind

Answer 15

:)