Find y', y' (11) and the equation of the tangent line to the curve x2 + sin(2my) - 121 at the point (11, 4) (use # ~ 3.14 and cos(27(4)) - 1) Solution. The derivative at r is given by : y'= The slope of the tangent line to the curve at (11, 4) is given by : y' (11) The equation of the tangent line to y - the curve at (11, 4) is given by