need help | Mathematics | Page 1

sour valve Jan 17, 2023, 10:06 PM

#

im very lost, im not sure on how to do this

acoustic finch Jan 17, 2023, 10:07 PM

#

Maybe double angle formula, have you tried that

sour valve Jan 17, 2023, 10:07 PM

#

like ik i can do 2(2sin2xcos2x) + sin2x + 1 = 0 but after that idk wut to do

acoustic finch Jan 17, 2023, 10:08 PM

#

You can do the same for sin2x. 2sinxcosx

sour valve Jan 17, 2023, 10:09 PM

#

2(2(2sinxcosx)(cos^2x - sin^2x)) + 2sinxcosx + 1 = 0

acoustic finch Jan 17, 2023, 10:18 PM

#

4sin2xcos2x + sin2x + 1 = 0
Maybe that

#

Then factor out the sin2x

#

And see when it's equal to -1

sour valve Jan 17, 2023, 10:19 PM

#

sin2x(1 + 4cos2x) + 1 = 0

#

ah alri

acoustic finch Jan 17, 2023, 10:19 PM

#

Aha, and move the 1 to the other side

#

So it's -1

sour valve Jan 17, 2023, 10:22 PM

#

wait but wut do u do now

#need help