Tan(A+45°) - tan(A-45°) =2sec2A​

Find the area of a parallelogram with base 15 yards and height 21 2/3

The function show two sisters' savings account and the rate at which they plan to deposit money

Item 1 use the polygon tool to draw a rectangle with a length of 4 units and a height of 2 units. one of the sides of the rectangle falls on line ef , and the rectangle has a vertex of e. each segment on the grid represents 1 unit.