1. What is the equation of the normal line to the curve y=sin(sinx)y=sin(sinx) at x=x=?

2. An object moves along the x-axis so that its position at any time t0 is given by x(t)=cos(2t²t+5). Find the velocity of the object as a function of t.

3. The position of a particle moving along a coordinate line is

s=6+3twith s in meters and t in seconds. Find the particle's velocity at t = 10 seconds.

4. A particle moves along a line so that its position at any time, t>1t>1,is given by the function s(t)= 2t²-4t+1, where s is measured in meters and t is measured in seconds. Find the velocity, v(t)v(t),at any given time, t.