Attachment 25325

in the problem in the above picture, how did they get from $\displaystyle 2cox+2sinxcox=0$ to $\displaystyle 2cosx(1+sinx)=0$?

Printable View

- Oct 21st 2012, 06:37 PMkingsolomonsgravetrig problem involving double angle forumlas
Attachment 25325

in the problem in the above picture, how did they get from $\displaystyle 2cox+2sinxcox=0$ to $\displaystyle 2cosx(1+sinx)=0$? - Oct 21st 2012, 06:58 PMchiroRe: trig problem involving double angle forumlas
Hey kingsolomonsgrave.

They are factoring out cos(x) of both sides. Remember that in distributive law if you have ab + ac, then you can factor this out to get a(b+c). - Oct 21st 2012, 07:04 PMkingsolomonsgraveRe: trig problem involving double angle forumlas
OH! of course, thanks!