SOLUTION: Prove that: TanA

SOLUTION: Prove that: TanA - CotA = -2Cot2A

Question 923335: Prove that:
TanA - CotA = -2Cot2A

Found 2 solutions by ewatrrr, lwsshak3:
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
-2Cot2A = -2(1-Tan^2A)/2TanA) = (Tan^2A-1)/TanA = TanA - 1/TanA = TanA - CotA
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
Prove that:
TanA - CotA = -2Cot2A
***
use x for A

start with left side:

verified: left side=right side
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