Select all the correct statements.
A. If sin(θ) = 23, then sec(θ) = 32
B. If cot(θ) = 13, then tan(θ) = 3.
C. If cos(θ) = sin(18°), then θ = 32°.
D. If sin(θ) = cos(θ), then θ = 45°.
E. If θ = 68°, then tan(θ) = cot(22°).

To find the extreme values of a function f(x. y) on a curve x-x(t), y y(t), treat f as a function of the single variable t and use the chain rule to find where df/dt is zero. in any other single-variable case, the extreme values of f are then found among the values at the critical points (points where df/dt is zero or fails to exist), and endpoints of the parameter domain. find the absolute maximum and minimum values of the following function on the given curves. use the parametric equations x=2cos t, y 2 sin t functions: curves: i) the semicircle x4,y20 i) the quarter circle x2+y-4, x20, y20 b, g(x, y)=xy

The linear combination method is applied to a system of equations as shown. 4(.25x + .5y = 3.75) → x + 2y = 15 (4x – 8y = 12) → x – 2y = 3 2x = 18 what is the solution of the system of equations? (1,2) (3,9) (5,5) (9,3)

Mis the midpoint of rq if rm equals 2x + 5 and mq equals 4x - 9 what is the length of rq