So I totally understand if you can not answer all of these...if you can then you are a god = D but any help i can get i will take thankfully!!!!!
1) which of the following expressions are identical?
a. cos^2 x b. (cosx)^2 c. cosx^2
2) Solve for x on the interval [0,2pi]
a. tan^2x-1 = 0 b. cos^2x + 3 cosx +2 = 0 c. 2sin^2x - sin x = 1
3)Factor
a. e^-x -xe^x + (2x^2) (e^2x)
b. sin x + tan x
4)The height of a cylinder is twice its diameter. Express the total surface area S as a function of the height h.
5) a light 3 meters above the ground causes a boy 180 cm tall to cast a shadow s centimeters long, measured along the ground. Express s as a function of his distance d from the light.
6) the surface area of a box with a square base and top is 3 square meters. Express the volume V of the box as a function of width, w, of the base.
7) A cylindrical can has a volume of 400pi cubic centimeters. The material for the top and bottom costs 3 cents per square centimeter. The material used for the vertical surface costs 2 cents per square centimeter. Express the cost of the materials used to make the can as a function of the radius r.
LAST ONE!!! sorry guys but thanks again!
8) a power station and a factory are on opposite sides of a river 2 km wide. A power line must be run from the power station. It costs $25 per meter to run the cable in the river and $20 per meter on land. Express the total cost as a function of x.
Tags: