First, we are going to add

from both sides of the equation:


Next, we are going to use the trig identity:

to rewrite our expression:



Finally, using our unitary circle, we can infer that

from 0 to

when

and

We can conclude that the solutions of the equation <span>cos (x) tan (x) -1/2=0 over the interval [0,2π] are: </span>
Answer:
1st pair x=-7 and -9; 2nd pair x=2 and y=2; 3rd pair x=-1 and y=0; 4th pair x=-3 and y= 2; 5th x=-2 and y=-1; All others are not clearly written
Step-by-step explanation:
method for simultaneous equation are substitution, elimination or matrix methods
I dont know if this is the right but i tried
Answer:
I wanna say B, but I really suck at this
;Let the number be x and y
x+y=20
hence:
y=20-x
(x+x^1/2)*(20-x+(20-x)^1/2)=155.55
solving the above we get:
x=6.51285 or x=13.4872
therefore one of the numbers is:
x=6.51285
or
y=13.4872