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Right Triangles and Trigonometry

SAT Math· difficulty 3/5

What is cos⁡(45°)\cos(45°)?

  • A

    11

  • B

    32\frac{\sqrt{3}}{2}

  • C

    12\frac{1}{2}

  • D

    22\frac{\sqrt{2}}{2}

    check_circle

Explanation

cos⁡(45°)=22\cos(45°)=\frac{\sqrt{2}}{2}.

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