Question

Anything I can help yall with?

Answer 1

Sasha is planning to put a patio around her new pool which has the dimensions 20m and 30m. She wants the patio to have a uniform width, x, and to surround the entire pool. Her budget is $6000 and she knows it will cost $10/m^2 to construct the patio. How wide can she afford the patio to be?

Answer 2

Prove the identity tan^2 u(1+cos 2u)=1-cos 2u