यदि समीकरणों $x = a \cos(\theta - \alpha)$ और $y = b \cos(\theta - \beta)$ से $\theta$ को विलुप्त किया जाए,तो $\frac{x^2}{a^2} + \frac{y^2}{b^2} - \frac{2xy}{ab} \cos(\alpha - \beta)$ का मान क्या होगा?

  • A
    $\cos^2(\alpha - \beta)$
  • B
    $\sin^2(\alpha - \beta)$
  • C
    $\sec^2(\alpha - \beta)$
  • D
    $\csc^2(\alpha - \beta)$

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