Respuesta :

sqdancefan

Answer:

  (a) 45°

  (b) 60°

Step-by-step explanation:

1. Read your scientific or graphing calculator's manual.

2. Put the calculator into "degrees" mode.

3. (a) Use the inverse sine function:

  sin⁻¹(.707107) = 45.000°

  (b) Use the inverse cosine function:

  cos⁻¹(0.5) = 60.000°

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Often, these functions are available as "2nd" functions on the same keys as the sin or cos functions.

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