The equation of the tangent to the curve y= xsinx at the point (π/2, π/2) is

a) y= x- π

b) y= .5

c) y= π- x

d) y=x+ .5

e) y= x

------------------------------------------------------

If m1 is the slope of the curve xy=2 and m2 is the slope of the curve x^2+y^2=3, then the point of intersection of the two curves is:

a) m1= - m2

b) m1*m2= -1

c) m1= m2

d) m1*m2 = 1

e) m1*m2 = -2