यदि $A$ और $B$ पूरक कोण हैं,तो:

  • A
    $(1 + \tan \frac{A}{2})(1 + \tan \frac{B}{2}) = 2$
  • B
    $(1 + \cot \frac{A}{2})(1 + \cot \frac{B}{2}) = 2$
  • C
    $(1 + \sec \frac{A}{2})(1 + \csc \frac{B}{2}) = 2$
  • D
    $(1 - \tan \frac{A}{2})(1 - \tan \frac{B}{2}) = 2$

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