A point on the ocean rises and falls as wave pass Suppose that a wave passes every 4 s, and the height of each wave from the crest to the trough in 0.5 m. a) how do we graph the height of the point relative to tis average height for a complete cycle, starting at the crest of a wave. And how do...

it looks easy but, I do not know what I did wrong: what is the derivative of f(x) = cosx -1/3(cos^3 x ) the answer is -sin^3 x while I got -sinx+cos^2 x * sinx ! and also with this : f(x) = 1/ (x+ sqr(x^2 +1))

be f and g Functions are Defined for any X. is it Known that 2f(x)-3g(x) and 5f(x)+4g(x) are Derivative in X0. prove that the product f(x)g(x) are Derivative in X0. thanks

Wow! These things are boogers! :eek: any way to make these things easier?

Hi there, I'm having difficulties with this particular question The function h: R- > R, h(t)=(t^2+at+10) e ^ - t, where a is a real constant, has a derivative h'(t) = (-t^2 + (2-a)t + (a-10))e^ -t. Find the values of a such that I) the graph of y=h(t) has exactly on stationery point. ii)...