∆ABC में, यदि ∠ B = 60° हो, तो सत्य होगा-
In ABC, if B = 60°, then true will be-

  • 1

    𝑏2 =𝑐2 + 𝑎2 

  • 2

    𝑏2 = 𝑐2 + 𝑎2-ac

  • 3

    𝑏2 = 𝑐2 + 𝑎2 + ac 

  • 4

    𝑏2 = 𝑐2+ 𝑎2 + 2ac

Answer:- 2

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