Question

Verify the identity.

cot^2x + csc^2x = 2csc^2x - 1

Answer 1

use the standard identity
cot^2 x = csc^2 x-1

Answer 2

then what?

Answer 3

you use that on left side and you directly get right side.
hence verified.

Answer 4

This should help: BTW, this is not my work, but computer generated.

Answer 5

thank you, that helps a lot.