1. f(t) = cos42t 2. f(t) = cos²5tcosh²5t

If a coffee filter is dropped, its velocity after t seconds is given by v(t)=4(10.0003t) feet per second. What is the terminal velocity, and how long does it take the filter to reach 99 of terminal velocity? Use a table increment of 0.1 and given your answer to the nearest tenth of a second.

Use sin0=0, sin2=1, and sin=0 to estimate sin3.

Solve cosh(z)=1/2