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AP EAMCET202120 Aug 2021Morning ShiftMathematicsTrigonometric Ratios & IdentitiesActual

If tan β = tan α + tan γ 1 + tan α tan γ then sin 2 α + sin 2 γ 1 + sin 2 α sin 2 γ =

Options

  1. Asin 2 β
  2. Bcos 2 β
  3. Ctan 2 β
  4. Dsec 2 β

Correct answer

A. sin 2 β

Step-by-step solution

Given, tan   β = tan   α + tan   γ 1 + tan   α tan γ = sin   α cos   α + sin   γ cos   γ 1 + sin   α cos   α . sin   γ cos   γ = sin   α . cos   γ + sin   γ . cos   α cos   α . cos   γ + sin   α . sin   γ ⇒ tan   β = sin   α + γ cos   α - γ … 1 sin   2 &#946

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