수식 9: arc tangent left parenthesis, StartFraction, negative "B" Over StartRoot, left parenthesis, "C" minus "A" , right parenthesis squared plus "B" squared , EndRoot plus "C" minus "A" , EndFraction , right parenthesisarctan−BC−A2+B2+C−A
9
수식 10: arc tangent left parenthesis, StartFraction, StartRoot, left parenthesis, "C" minus "A" , right parenthesis squared plus "B" squared , EndRoot minus left parenthesis, "C" minus "A" , right parenthesis Over negative "B" , EndFraction , right parenthesisarctanC−A2+B2−C−A−B
