Question

Please help me

Answer 1

graph it

Answer 2

see page 2

http://tutorial.math.lamar.edu/pdf/Trig_Cheat_Sheet.pdf

Answer 3

@ohohaye
\[\large \bf \cos2x=2\cos^x-1\]

Answer 4

Wait, so it is true?

Answer 5

yup ! @ohohaye

Answer 6

ok, thank you

Answer 7

your welcome :)

Answer 8

shouldn't it be false?

Answer 9

I graphed both functions and they were different

Answer 10

yes, it should be !

Answer 11

oh ! i am really sorry @ohohaye
this is FALSE

Answer 12

Wait but, you told me that it was True

Answer 13

\[\large \bf \cos2x=2\cos^2x-1\]
\[\large \bf 2\cos^2x=1+\cos2x\]
\[\large \bf \cos^2x=\frac{1+\cos2x}{2}=\color{red}{Answer}\]

Answer 14

sorry... @ohohaye i don't know how i said TRUE ?

Answer 15

thank you for correcting my mistake ! @10115658

Answer 16

its ok, thanks everyone who helped me

Answer 17

:)

Answer 18

No problem, simple mistake

Answer 19

How about a medal lol

Answer 20

lol
i don't care for MEDALS !

Answer 21

I'm one away from a title haha

Answer 22

I TRIED MY BEST !

Answer 23

Thank you kindly

Answer 24

no problem :)