1 - cos(6x) = ___?
O A. 3sin(2x)
B. 3cos(2x)
O C. 2cos2(3x)
D. 2sin?(3x)

What are the equivalent ratios for 24/2= /3= /5.5=108/ = /15

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters

3x + 4y = 5 x- 3y = -7 solve by substitution