9.35. 9.36. Show first fundamental form Of the; surface x = y(s) -F the du2E binorrnal b(s) of a curve y = y(8) is I Find thelength of the are e = sin r (sin # sin e)er + (cos .)eg. 9.35. 9.36. Show first fundamental form Of the; surface x = y(s) -F the du2E binorrnal b(s) of a curve y = y(8) is I Find thelength of the are e = sin r (sin # sin e)er + (cos .)eg.