Question

Picture coming up.

Answer 1

Using
\[t=\frac{s}{c}\]

you can see that cosine actually cancels out
leaving
\(=sin^2x\)

Answer 2

what makes identities be identities or non identities?

Answer 3

LHS is \(\sin^2{(x)}\)
And RHS is \(\Large \frac{1}{csc^2(x)}=\frac{1}{(\frac{1}{sin^2x})}=\sin^2(x)\)
So LHS=RHS
Then this is an identity

Answer 4

ohh okay..Lol thank you :)