Contoh/ Example 15 (60)
60 = 15 = 4
15 ialah faktor bagi 60.
15 is a factor of 60.
(c) 5 (268)​

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) = .

If you have 12 feet of string and you cut it into equal length of 5 inches each how much string will be left

Which is the focus of a parabola with equation y2=4x