यदि cos(A+B) = 𝜶cosA cosB+ 𝜷𝒔𝒊𝒏𝑨 𝒔𝒊𝒏𝑩 है, तब (𝜶,𝜷) का मान क्या होगा -

  • 1

    (-1, -1)

  • 2

    (1, -1)

  • 3

    (-1, 1)

  • 4

    (1, 1)

Answer:- 1

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