Let a and b, respectively, be the absolute minimum and maximum values of the function f(x1,)=x21+x22++x2n within the region x21+2x22+3x23++nx2n≤1. let c be the absolute minimum value of f(x1,) on just the boundary of the region. what is a + b + c ?

How do you do this geometry problem

Given (1+cosx)/(sinx) + (sinx)/(1+cosx) =4, find a numerical value of one trigonometric function of x. a. tanx=2 b. sinx=2 c. tanx=1/2 d. sinx=1/2

Acircle has a circumference of 2 pi cm. which statement about the circumference and area is true? a comparison of the area and circumference is not possible since the area cannot be determined. the numerical values of the circumference and area of the circle are equal. the numerical value of the circumference is greater than the numerical value of the area. the numerical value of the circumference is less than the numerical value of the area.