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RegneCentralen RC700 "Piccolo"

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⟦b019885b8⟧ TextFile

    Length: 1280 (0x500)
    Types: TextFile
    Names: »INVERS.PAS«

Derivation

└─⟦3702e543b⟧ Bits:30003064 Demoprogrammer A-J til Pascal bog
    └─ ⟦this⟧ »INVERS.PAS«

TextFile

        PROGRAM invers;
        
          VAR
            i : INTEGER;
            x : REAL;
            
          FUNCTION arcsin(x : REAL) : REAL;
            
            BEGIN
              IF ABS(x) < 1
                THEN arcsin := ARCTAN(x / SQRT(1 - x * x))
              ELSE IF x = 1
                THEN arcsin := PI / 2
              ELSE IF x = -1
                THEN arcsin := -PI / 2;
            END;
          
          FUNCTION arccos(x : REAL) : REAL;
          
            BEGIN
              IF x = 0
                THEN arccos := PI / 2
              ELSE IF (0 < x ) AND (x <= 1)
                THEN arccos := ARCTAN(SQRT(1 - x * x) / x)
              ELSE IF (-1 <= x) AND (x < 0)
                THEN arccos := ARCTAN(SQRT(1 - x * x) / x) + PI;
            END;
          
          BEGIN (* invers *)
            WRITE(CLRHOM);
            WRITELN('x' : 4, 'ARCSIN(x)' : 15, 'ARCCOS(x)' : 15);
            WRITELN;
            FOR i := -10 TO 10 DO
              BEGIN
                x := i / 10;
                WRITELN(x : 4 : 1, arcsin(x) : 15 : 8, arccos(x) : 15 : 8);
              END;
          END. (* invers *)
«eof»