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If you're typing " cos(40) ", then BASIC is thinking 40 radians, not 40 degrees.
One radian is (180/pi) or about 57.3 degrees.
Your 40 radians works out to about 2,292 degrees. The cosine of that ugly thing
is the same as the cosine of 132 degrees, which is -0.669 .
If your BASIC program involves angles, and you'll be inputting them in degrees like
all normal people typically do, then your program has to divide each one by 57.3
before it tries to work with the angle.
57.3 is off by about 0.007 percent. If you need better accuracy than that, then define
a quantity in your program, say 'K' = 3.141593/180 , and then whenever an angle
arrives in degrees, multiply it by 'K' before the program gets it.
If the program has to figure out an angle and give it to you, then it should divide
the angle by 'K' before you get it.
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degrees
The basic unit in which angles are measure is?
degrees
