$\sin^{2} \theta = \frac{(x+y)^{2}}{4xy}$ केवल तब संभव है जब

  • A
    $x > 0, y > 0, x \neq y$
  • B
    $x > 0, y > 0, x = y$
  • C
    इनमें से कोई नहीं
  • D
    $x < 0, y < 0, x = y$

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$\tan \theta \sin \left( \frac{\pi }{2} + \theta \right) \cos \left( \frac{\pi }{2} - \theta \right) = $

यदि $\sec \theta + \tan \theta = p, (p \neq 0)$ है,तो $\sec \theta$ का मान क्या होगा?

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