Cos -2x or -cos2x, it's the difference.
19.6 would be the area of a single base circle πr² is the area formula
Subtract 15 from both sides of the equation
Simplify
Divide both sides of the equation by the same term
Simplify
ANSWER: x= 52/9
I'm assuming you don't still need these? Sorry I didn't see this in time
Okay, to find length CE, your going to know the value of x. Length BC + CE = BD + DE.3x+47+x+26=27+x+10Simplify the equation to get4x+73=37+xyou can choose one of four ways to continue, but I will choose to subtract x3x+73=37Subtract 73 from both sides of the equal sign3x=-36divide by 3 on both sides of the equal sign to get the value of xx=-12Now, plug in -12 for x in length CE to get -12+26=14
