Fixed point cosine of binary angles.


This function finds the cosine of a value using a lookup table. The input value must be a fixed point binary angle. Example:
      fixed angle;
      float result;

/* Set the binary angle to 45 degrees. */ angle = itofix(32); /* The cosine of 45 degrees is about 0.7071. */ result = fixtof(fixcos(angle)); ASSERT(result > 0.7 && result < 0.71);
Returns the cosine of a fixed point binary format angle. The return value will be in radians.
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