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12.6.9 Trigonometric operations

Unsafe Operation: $flsin fl
Unsafe Operation: $flcos fl
Unsafe Operation: $fltan fl

Return the sine, cosine and tangent of the operand.

Unsafe Operation: $flasin fl
Unsafe Operation: $flacos fl
Unsafe Operation: $flatan fl
Unsafe Operation: $flatan fl1 fl2

Return the arcsine, arccosine and arctangent of the operand. When $flatan is applied to two arguments, it returns an equivalent of:

(angle (make-rectangular fl2 fl1))
Unsafe Operation: $flatan2 fl1 fl2

Return an equivalent of:

(angle (make-rectangular fl2 fl1))