Question 8f33bba4

Geometry and Trigonometry - Right triangles and trigonometry

  • One angle is a right angle.
  • The length of the side opposite the right angle is 21.
  • The length of one side adjacent to the right angle is 6.
  • The length of the other side adjacent to the right angle is a.
  • A note indicates the figure is not drawn to scale.

For the triangle shown, which expression represents the value of a ?

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