Hidden Label: left bracket, left parenthesis, arcsin left parenthesis, StartFraction, "c" Over StartRoot, "a" squared plus "b" squared , EndRoot , EndFraction , right parenthesis minus "A" left parenthesis, "a" , "b" , right parenthesis , 0 , right parenthesis , right bracketarcsinca2+b2−Aa,b,0
Label
equals=
left parenthesis, 1.9 7 8 , 0 , right parenthesis1.978,0
8
Solve using Euler's formula
9
Hidden Label: left bracket, left parenthesis, "A" left parenthesis, "b" "c" minus "a" StartRoot, "a" squared plus "b" squared minus "c" squared , EndRoot , "a" "c" plus "b" StartRoot, "a" squared plus "b" squared minus "c" squared , EndRoot , right parenthesis , 0 , right parenthesis , left parenthesis, "A" left parenthesis, "b" "c" plus "a" StartRoot, "a" squared plus "b" squared minus "c" squared , EndRoot , "a" "c" minus "b" StartRoot, "a" squared plus "b" squared minus "c" squared , EndRoot , right parenthesis , 0 , right parenthesis , right bracketAbc−aa2+b2−c2,ac+ba2+b2−c2,0,Abc+aa2+b2−c2,ac−ba2+b2−c2,0
Label
equals=
left parenthesis, 1.9 7 8 , 0 , right parenthesis1.978,0
left parenthesis, 0.9 3 1 9 , 0 , right parenthesis0.9319,0
10
WolframAlpha's solution
11
Hidden Label: left bracket, left parenthesis, 2arctan left parenthesis, StartFraction, "b" plus StartRoot, "a" squared plus "b" squared minus "c" squared , EndRoot Over "a" plus "c" , EndFraction , right parenthesis , 0 , right parenthesis , left parenthesis, 2arctan left parenthesis, StartFraction, "b" minus StartRoot, "a" squared plus "b" squared minus "c" squared , EndRoot Over "a" plus "c" , EndFraction , right parenthesis , 0 , right parenthesis , right bracket2arctanb+a2+b2−c2a+c,0,2arctanb−a2+b2−c2a+c,0
Label
equals=
left parenthesis, 0.9 3 1 9 , 0 , right parenthesis0.9319,0
left parenthesis, 1.9 7 8 , 0 , right parenthesis1.978,0
12
Expression 13: "x" equals arc sine left parenthesis, StartFraction, "a" StartRoot, "a" squared plus "b" squared minus "c" squared , EndRoot plus "b" "c" Over "b" squared plus "a" squared , EndFraction , right parenthesisx=arcsinaa2+b2−c2+bcb2+a2