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Question 1. The derivative of  function f(x)=2cos(3x-1)sin2x   is
a) f′(x)=4sin(3x-1)sin2x-6cos2xcos(3x-1)  
b) f′(x)=-4sin(3x-1)sin2x+6cos2xcos(3x-1)  
c) f′(x)=6sin(3x-1)sin2x-4cos2xcos(3x-1)  
d) f′(x)=sin(3x-1)sin2x+cos2xcos(3x-1)  
e) f′(x)=-6sin(3x-1)sin2x+4cos2xcos(3x-1)  
Question 2. The radius r   of a ball is changing with a velocity v.   Its volume is changing with the velocity
a) 4πr2v2  
b) 4πr2v  
c) 2πr2v  
d) πrv  
e) 4πrv  
Question 3. The function f(x)=5+2sin2x+2cos2x   on  interval (0,2π)  
a) is strictly monotonic
b) is both increasing and decreasing
c) is decreasing
d) is increasing
e) is constant

Evaluate