Question

45°

Answer 1

Answer:

   $x = \sqrt{\frac{7}{2} }$

Step-by-step explanation:

Explanation

From given graph

          AC = √7

 Given angle ∝ = 45°

    $cos\alpha = \frac{adjacentside}{Opposite side}$

   $cos45 = \frac{x}{\sqrt{7} }$

      $\frac{1}{\sqrt{2} } = \frac{x}{\sqrt{7} }$

       $x = \frac{\sqrt{7} }{\sqrt{2} }$

      $x = \sqrt{\frac{7}{2} }$

     x = 1.8708