Seems all OK to me. sin is invertible in -90..90, cos in 0..180, tan in 0..180. sec=1/con, cosec=1/sin, cot=1/tan.

-- 
        dakkar - Mobilis in mobile

In reply to Re: Any Mathematicians Onsite with a spare 5 minutes? by dakkar
in thread Any Mathematicians Onsite with a spare 5 minutes? by tachyon

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