Precalc - Quadrant for Angles (Radians as Multiple of pi)
表达式4: "a" equals 4a=4
negative 10−10
1010
4
表达式5: "b" equals 6b=6
negative 10−10
1010
5
表达式6: phi left parenthesis, "t" , right parenthesis equals StartFraction, "a" Over "b" , EndFraction times pi times "z" left parenthesis, "t" , right parenthesisϕt=ab·π·zt
