Find an identity for cos (4t) in terms of cos (t).

I have used 2cos^2 (2t) - 1 but I need to rewrite that in terms of cos (2t).

Larry's evening is spent reading and watching TV. He can spend no more then 4 hours total on these activites, and he wants to spend more time reading then watching TV. (which graph represented this situation.)

How to solve 4y-2/5y 4/5 = - 3

Pick any number and add 1 to it. find the sum of the new number and the original number. Add 9 to the sum. Divide the new sum by 2 and subtract the original number from the quotient

How do we find the value of - q in the equation - q-3=7

The polynomial x3 + 8 is equal to

The school band sold T-shirts to raise money for an upcoming trip. It sold 120 shirts, which was 30 percent of the total sales on Sunday. How many T-shirts did the band sell in all? Check all that apply.

What are some examples of the golden ratio involving art?

Ashton left his house and ran 4 miles east and 3 miles north he took the diagonal path back home if he burned 105 calories every mile that he ran how many total calories did he burn on this run

Solve 3x-5y=13 4x+8y=-9

Lewis needs 1/8 quart of paint to cover 10 square yards. How many square yards can he paint with 4 quarts of paint?