I'm having a tough time with this question:
$f(x) = -3 + 2\cos(x) $
$g(x) = \cos(x- \frac{\pi}4) -2$
Sum of functions: $s(x) = f(x) + g(x)$ Difference of functions: $v(x) = f(x)-g(x)$
Get the sum of functions and the difference of functions (both sinusoids), round off to 2 decimal places. We are allowed to use the Ti=84+ (so we can use calc max, calc intersect, etc.)
The answers are:
$s(x) = -5 + 2.80\cos(x – 0.26)$
$v (x) = -1 + 1.47\sin (x – 4.21)$
- ps - Also please correct my terminology, I want to learn how to say mathematical terms and such in english.