2.2 Differentiation Rules for Constant Multiples, Sums, Powers, Sines, and Cosines Constant Rule:The derivative of a constant is zero. Find the derivatives of:
Power Rule:If n is a rational number, then Find the derivatives of: rewritten as
Differentiate: Sum and Difference Rules
Differentiate: Derivatives of Sine and Cosine
Find the slope and equation of the tangent line of the graph of y = 2 cos x at the point f’(x) = -2sin x Therefore, the equation of the tangent line is: Day 1
The average rate of change in distance with respect to time is given by… change in distance change in time Also known as average velocity
Ex. If a free-falling object is dropped from a height of 100 feet, its height s at time t is given by the position function s = -16t , where s is measured in feet and t is measured in seconds. Find the average rate of change of the height over the following intervals. a. [1, 2] b. [1, 1.5] c. [1, 1.1] a. b. c.
At time t = 0, a diver jumps from a diving board that is 32 feet above the water. The position of the diver is given by where s is measured in feet and t in seconds. a.When does the diver hit the water? b.What is the diver’s velocity at impact? To find the time at which the diver hits the water, we let s(t) = 0 and solve for t. t = -1 or 2 -1 doesn’t make sense, so the diver hits at 2 seconds.
The velocity at time t is given by the derivative. s’(t) = v(t) = -32t + t = 2 seconds, s’(2) = -48 ft/sec. The negative gives the direction, which in this case is down.