One revolution is 360 degrees or 2 pi radians ( full circle)
So 13 rev = 13 x 60 degrees or 13 x 6.28 radians
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13sin60 = -3.963 radians = 11.258 degrees
F = (C x 1.8) + 32F = (13 x 1.8) + 32F = 23.4 + 32Fahrenheit = 55.4°
To convert degrees Fahrenheit to degrees Celsius, subtract 32, multiply by 5, and divide by 9. In this instance, 55.4 - 32 = 23.4 x 5 = 117/9 = 13 Therefore, 55.4 degrees Fahrenheit is equal to 13 degrees Celsius.
difference between -9 degrees and 13 degrees
90-13 = 77 degrees.