6. A rectangle has a length that is five feet more than three times its width. The perimeter of the rectangle is 66 feet. Which equation below would model the information given about this
rectangle?
(5 Points)
02w+3(w+5)=66
2w+3w+5=66
2w+3(2w+5)=66
Ow+3w+5=66

Prove (a) cosh2(x) − sinh2(x) = 1 and (b) 1 − tanh 2(x) = sech 2(x). solution (a) cosh2(x) − sinh2(x) = ex + e−x 2 2 − 2 = e2x + 2 + e−2x 4 − = 4 = . (b) we start with the identity proved in part (a): cosh2(x) − sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 − sinh2(x) cosh2(x) = 1 or 1 − tanh 2(x) = .

Use the squared identities to simplify sin^2x cos^2x

What graph represents an even function