Question

Find the value of y. Round your answer to nearest tenth. Please help

Answer 1

9514 1404 393

Answer:

  (c)  52.0

Step-by-step explanation:

The angle whose cosine is 8/13 is found using the inverse cosine function:

  y° = arccos(8/13) ≈ 52.0°

  y ≈ 52.0

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The calculator button to compute this value is probably labeled cos⁻¹. You may need to access the function using a Shift or 2nd key. The calculator must be set to degrees mode to prevent the answer from appearing in radians or grads. If you use a spreadsheet, your formula may look like ...

  =DEGREES(ARCCOS(8/13))