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Different answers in mathematica and my calculator.


4/(3Power[2(-2)+3, (3)^-1])

I get -(4/3) (-1)^(2/3) in Mathematica but only -4/3 on my calculator.


N[Sec[8/(8 Sqrt[2])]]/Degree to get Cos^-1 of 8/(8 Sqrt[2]) and it gives me 75 deg instead of 45...

I'm not sure what I'm doing wrong, I tried in Wolfram Alpha and it gives me the same thing.

Thank you.

-Francis



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