Verify for all integers ,

.

Help? I know the double angle, half-angle, and sum and difference formulas, but I can't figure out how to verify it.

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- February 28th 2009, 11:14 AMchrozerVerifying
Verify for all integers ,

.

Help? I know the double angle, half-angle, and sum and difference formulas, but I can't figure out how to verify it. - February 28th 2009, 11:17 AMMoo
- February 28th 2009, 12:28 PMchrozer