# find an equation for the line tangent to the curve at the point defined by the given value of t. Also, find the value of d2y/dx2 at this point 1. x = 4 sin t, y = 2 cost, t = pai/4 2. x = cos t, y = sqrt(3)cos t ,t=2pai/3

Question

find an equation for the line tangent to the curve at the point defined by the given value of t. Also, find the value of d2y/dx2 at this point

1. x = 4 sin t, y = 2 cost, t = pai/4

2. x = cos t, y = sqrt(3)cos t ,t=2pai/3