Find the value of between cos2 β – sin2 β

If cos2 α – sin2 α = tan2 β, then the value of cos2 β – sin2 β is

  1. Cot2 α
  2. Cot2 β
  3. tan2 α
  4. tan2 β
Manish Listener Asked on 18th June 2015 in Maths.
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