Question

PLEASE HELP I will give MEDAL and FAN. Im solving trig equations... Picture attached below.

Answer 1

i must be blind :D

Answer 2

lol i wasnt fast enough

Answer 3

cos(2x) = 1- 2sin^2 x

Answer 4

Ok how did you get that?

Answer 5

that's a formula XD
sin^2 x+cos^2 x = 1

Answer 6

Oh right lol sorry Im trying to learn this on my own

Answer 7

np :)

Answer 8

can you do the rest? :D

Answer 9

probably not if you could show me the steps that would be great

Answer 10

okay so you have sin^2 a + cos 2a =1/2
sin^2 a + 1- 2sin^2 x =1/2
then
1-sin^2 x =1/2