.523599 ST q := ASIN

In the ST editor, either

is open in the ST

Result: TRUE ST VAR

.546302 ST q := TAN

Result: 90 ST Var1 :=

Result: 30 ST Var1 :=

ST Var1 := 20 <=

.0472 ST q := ACOS

.463648 ST q := ATAN