cryptography question--how to solve a Ceaser Cipher
yeah, probably a very simple question i know, but we are at a loss of what to do. We haven't been given any instruction on how to solve one, but the quest we were given is
The following message is a Caesar Cipher, a message encrypted by...
ok, gotcha thus far. but now what i am unsure of is how you would implicity take the derivative for arctan(x/2). i can't recall how u would treat the (1/2)x in the derivative.
something like this?
dθ/dt = [1/(1+ x^2/4)] dx/dt
that can't be right, because when i substituted, i ened up...
here is the problem i was trying to do:
A baseball player stands 2 feet from home plate and watches a pitch fly by. Find the rate D(theta)/dt at which his eyes must move to wach a fastball with dx/dt=-130 ft/s as it crosses homeplate at x=0.
now there is a nice diagram of a right...
yes i have my book, but it doesn't help me figure out this problem which is what i need to do. what we've been doing is intergrals with one trig function to an odd power, and the other to an even. so the method has been substitue something for a trig power squared. i am lost as to what to do...