Alright, so one of my questions is CSC (angle) -5. When I plug CSC in my calculator, it says "math error." I'm using a Casio fx-300 MS, and using shift + cos, then putting an angle, such as 90.
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$\begingroup$While I am unfamiliar with your Casio FX-300 MS, remember that CSC(Θ) has reciprocal identities where:
Csc(θ)= 1/(Sin(θ))
So, if your question is Csc(θ)-5=Ans, try it as (1/Sin(θ) )-5=Ans and you should get the same answer you intended to get. I hope this helps.
edit: [Also, (again I do not know your calculator) Should it be shift + Sin by chance to work a Csc(θ)?]
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