Right Triangles and Trigonometry

SAT Math· difficulty 2/5

In right triangle ABCABC with right angle at CC, the side opposite angle AA has length 33 and the hypotenuse has length 55. What is sinA\sin A?

  • A

    34\frac{3}{4}

  • B

    45\frac{4}{5}

  • C

    35\frac{3}{5}

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  • D

    53\frac{5}{3}

Explanation

sinA=oppositehypotenuse=35\sin A = \frac{\text{opposite}}{\text{hypotenuse}} = \frac{3}{5}.

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