Check my answer? the law of cosines reduces to the pythagorean theorem when the triangle is right. true or false i select false

What is the value of the digit 1 in the number 13?

Which expression is equivalent to (3^2)^-2 a.-81 b.-12 c.1/81 d.1/12

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