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View Full Version : Solve verifying the identity

qazxswedcvfrtgb
Dec 8, 2010, 08:27 PM
csc^4x-cot^4x=csc^2x cot^2x
Unknown008
Dec 9, 2010, 12:24 AM
\csc^4x-\cot^4x=\csc^2x + \cot^2x

Notice that the LHS is a difference of two squares.
Then, use the fact that 1 + \cot^2x = \csc^2 x