find the lines that are
tangent and normal to th ecurve at the point given
1. 2xy+piesiny=2pie (1, pie/2)
2. x^2cos^2y-siny=0 (0, pie)
tangent and normal to th ecurve at the point given
1. 2xy+piesiny=2pie (1, pie/2)
2. x^2cos^2y-siny=0 (0, pie)