Right Triangles and Trigonometry

SAT Math· difficulty 4/5

A 20-ft ladder leans against a wall at an angle of 75°75° with the ground. How far from the wall is the foot of the ladder? (Use cos75°0.259\cos 75°\approx 0.259.)

  • A

    77.277.2 ft

  • B

    1010 ft

  • C

    5.185.18 ft

    check_circle
  • D

    19.3219.32 ft

Explanation

Distance =20cos75°20(0.259)=5.18=20\cos 75°\approx 20(0.259)=5.18 ft.

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