fixcos
Fixed point cosine of binary angles.
Description
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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