Proving Identities

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June 1st 2005, 09:47 AM
zamorakk0

i need help with this one...

tanx-tan(x-y) = tany
1+tanx*tan(x-y)
June 1st 2005, 04:05 PM
vms

$\[\frac{tan(A) - tan(B)}{{1 + tan(A)*tan(B)}} = tan(A - B)$

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