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|dw:1353025115000:dw|

look at the LHS...try factoring out csc^2 what do you get?

|dw:1353025247991:dw|

not exactly....if you factor out csc^2 then csc^4 becomes csc^2 but csc^2 doesn't become csc^2

|dw:1353025341525:dw|

Would it even exist, that is, would it cancel? Or just be csc?

what is csc^2/csc^2?

ohhhh. I feel dumb. Got ya.

so what should the factored form be?

|dw:1353025535036:dw|

right

now what is csc^2 - 1?

cot?

cot^2

csc2 = 1/sin...it also equals cot+1

cot^2 + 1 not cot + 1

Sorry, your exactly right.

would the lhs say csc cot ^4? The RHS is cot^4 +cot^2

Its not that I'm confused as much as tired my friend.
|dw:1353026333309:dw|

well anyway... cot^2(cot^2 + 1) becomes cot^4 + cot^2
so you have just proven the identity

Thanks!!!!!!!

welcome