Question

How to find sin^2x - cos^2x = 0

Answer 1

hello

Answer 2

do you know that sin^2(x)+cos^2(x)=1?

Answer 3

add these equations together giving you 2 sin^2(x)=1

Answer 4

But it's subtracting.. I missed class and I'm kinda lost with trig equations

Answer 5

what? I don't understand what you are saying ...

Answer 6

Did you not understand what I meant by adding the equations...

Answer 7

sin^2(x)-cos^2(x)=0 is the equation you have
sin^2(x)+cos^2(x)=1 is an identity
-------------------- I added the equations together
2sin^2(x)+0=1
2sin^2(x)=1 <---you just have to solve this one now

Answer 8

Ooooohhh, gotcha.!