how do i estimate the area under the graph of f(x) = 2 cos(x) from x=0 to x= π / 2 using four approximate rectangles and right endpoints . how would i round it to 4 decimal places? And how would the graph with the shaded rectangles look like ? would it be an overestimate ?

Given f''(x) 9 sin(3x) and f (0) 6 and f(0) = 3. %3D Find f 2. 6) -

cos 3x = √3/2 x =

Find d cos[rin' (-2] the exacd value

Given f''(x) = - 9 sin(3x) and f'(0) = – 4 and f(0) = 5. %3D %3D Find f( Submit Question Jump to Answer MacBool %23 5.

A tank initially contains 300 gallons of water with 50lbs of salt disolved in the water. A brine solution is pumped into the tank at a rate of 5gal/min and the wellstirred mixture is pumped out of the tank at the same rate. The concentration of salt in the inflow is variable and is given by cin = (2 + sin(t/4))lbs/gal. Find the amount of salt in the tank at any time t.

A =( ) Find sinh At

Evaluate. (a) ∫x(x+ 1)^2 dx. (b)∫(upper) π/4 (lower) 0 (1 + 2 secθtanθ)dθ

Consider the graph of the function y = cos(t^4). As t increases, the "period" of the function gets smaller and smaller. Is the function concave up or concave down at t= 10?

why arctan(1/0)=pi/2