Pre-Calculus: Using Double-Angle Identities

[Ghaiyst]

@ 2:21 dude I swear repeat this. He is like a lame joker. get it! XD

[TheWay2gobub]

Where would you go from here? you still need to find x values from (o, 2pi)

[sailornaruto39]

1:59

Bblew my mind much, inception

[sailornaruto39]

@sailornaruto39 *blew

[Dirtyshamable]

gr8 colors 

[riashadbro]

haha best maths teacher or what

[BorealNeal]

keep pressing any of these numbers theyre all funny : 3, 4, 5, 7,

[BorealNeal]

omg that joke on signs and sin lol really?

[marysgnawfulsurprise]

ur my hero.

[pinoyelite]

this is wrong... its supposed to be 1-2sin^2x

[Dargue300]

@pinoyelite actually he is right because cos can be 1-2sin^2x, 2cos^2x-1, or cos^2(x)-sin^2(x). He just used the last one.

[xxcowslayerxxx]

you just broke the record for lamest joke ever, lol

[Janac]

haha that's good one

[shylildude]

lol on the joke