Question

is f(x)=2cosx+sin3x a sinusoid

Answer 1

Graphing the function, I get

http://prntscr.com/b79lre

which is not a simple sine curve of the form y = k*sin(x). So it's not a sinusoid.

Answer 2

oh thanks, i couldn't get a graph of it for some reason @jim_thompson5910

Answer 3

you typed in `2cos(x) + sin(3x)` right?

Answer 4

yes in ti84 calculator

Answer 5

you may need to zoom out

my window is
xmin = -10
xmax = 10
ymin = -10
ymax = 10

Answer 6

oh i see thanks

Answer 7

no problem