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正所謂書到用時荒恨小....老餅求幫助.

L^2=H^2+W^2
H=sqrt(L^2-W^2)=48.99

Sin A=W/L
A=Inv(Sin (W/L))=Inv(Sin(0.2))=11.54 deg

Cos B=W/L
B=Inv(Cos (W/L))=Inv(Cos(0.2))=78.46 deg


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