Question

is this equation true or false?

Answer 1

There is no equation... undefined :P

Answer 2

lol why the suspense

Answer 3

\[\cos(65°)=\sqrt{1+\cos(130°)/2}\]

Answer 4

lol

Answer 5

half angle theorem \[\LARGE \sin (\frac{x}{2}) = \frac{\sqrt{1 + \cos x}}{2}\]

Answer 6

It's supposed to be sin65 isn't it?

Answer 7

or if you prefer it this way... \[\LARGE \sin (x) = \frac{\sqrt{1 + \cos(2x)}}{2}\]

Answer 8

right........

Answer 9

assume x is 65...what is 2x?

Answer 10

1+cos2 q=2(cosq)^2

Answer 11

@lgbasallote it equals to cosx......not sinx

Answer 12

so its..false?

Answer 13

true.....@mInnocenti

Answer 14

thank yoouuu :D

Answer 15

welcome!