A(n) is a closed shape made up of points that are the same distance from a fixed point called the center. circle arc radius diameter

What basic trigonometric identity would you use to verify that sin x cos x tan x =1-cos^(2)x?

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

3x + 4y = 5 x- 3y = -7 solve by substitution