I'm having trouble proving this identity.

[warwick]

There are various methods listed in the book, but they're not working. Or I'm doing them incorrectly.

cot squared x / csc x - 1 = 1 + sin x / sin x

 

[skeeter]

hint ...

cot²x = csc²x - 1 = (cscx + 1)(cscx - 1)

 

[warwick]

hint ...

cot²x = csc²x - 1 = (cscx + 1)(cscx - 1)

[expletive delted] The product of a sum and a difference is equal to the difference of two squares. :roll: