A line making angles 45° and 60° with the positive directions of the axes of x and y makes with the positive direction of z-axis, an angle of
60°
120°
60° or 120°
None of these
Domain of the function f(x) = logx(cos(x)), is
None of these
D.
None of these
We have the function
f(x) =
f(x) is defined for cos(x) > 0,
x > 0,
Also, x > 0, x 1
.