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$\tan θ + s e c θ = x$ হলে, $\cos e c θ$ -এর মান কত? (If $\tan θ + s e c θ = x,$ then what is the value of $\cos e c θ$ )

\frac{x^{2} + 1}{x^{2} - 1}

\frac{x^{2} - 1}{x^{2} + 1}

\frac{1 - x^{2}}{1 + x^{2}}

\frac{1 + x^{2}}{1 - x^{2}}

ANS : 1

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