I really need help on this question, you get a good amt of points for it. plus The interval is 0 ≤ θ ≤ 2π
2cos²(x) + 3cos(x) - 2= 0

and

2sin²(x) -cos(x) -1 = 0

i think it's ф or x=6,-6

step-by-step explanation:

-x^2=-36

x^2=-36

ф

or

if you mean by : -(x^2)=-36

it'll be: x^2=36

x=6,x=-6

hope it'll ! have a good day!

you for asking!

a

step-by-step explanation:

this linear equation would have just one solution.

step-by-step explanation:

the reason why this would have one solution is that it is an expression with just one variable. since that variable is not raised to a power, it will always have just one solution.