3. given the differential equation y"+y= 0 and the set of two functions sint-cost, sint + cost, show that this a fundamental set of functions for the equation, and note the interval(s) over which this is true. wken (osxsihx | cos sint

Answer with explanation:

Given the differential equation

y''+y=0

The two function let

Differentiate

Then we get

Because

We find wronskin to prove that the function  is independent/ fundamental function.

w(x)=

Hence, the given two function are fundamental set of function on R.

i think the correct option is the second option.

answer: 0

step-by-step explanation: the positive, like 5, + its opposite, like -5 would be 0

5+(-5)=0, or 5-5=0