What is the best approximation of angle A, given cos A = .578?

30.03°

35.31°

43.89°

54.69°

Question

What is the best approximation of angle A, given cos A = .578?
      
30.03°

      
35.31°

      
43.89°

      
54.69°

amistre64 · Answer

thats a little over half; what angle has a cosine of 1/2?

amistre64 · Answer

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amistre64 · Answer

.... um, is that in degrees or radians?  cause in degrees that would be a little bigger than 60

anonymous · Answer

Should be degrees

amistre64 · Answer

hmm, seems odd to me, but its still the one closest to 60 degrees :)

amistre64 · Answer

ahh, i see my confusion; as the degrees get bigger, the cos value gets smaller; so yeah its a little shy of 60

anonymous · Answer

okay thanks so much! i have more questions after this if you could help

amistre64 · Answer

ill be around, but if they are similar to this  i would suggest getting comfortable with the unit circle for sin and cos values