Plz ! the expression (cosx) / (1 - sinx) is equivalent to
a) (1+sinx) / cosx
b) (1-sinx) / cosx
c) cos(x)(1+sin(x))
d) cos(x)(1-sin(x))

How do you summarize data in a two-way frequency table?

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

What are the interpretations of the line 3x - 15y = 60? x-intercept y-interception a: x 20 - y -4 b: x 5 - y 20 c: x -3 - y 15 d: x -4 - y 20