Sin^2 (2x) = (1 - cos(4x))/2
---> sin^4 (2x) = (1/4)(1 - cos4x)^2 = (1/4)(1 - 2cos4x + cos^2 (4x)) and replace cos^2(4x) by (1/2)(1+cos(8x)) --->answer
Nope!
Let's say there are 14 boys and 15 girls in a math class. We can use the ratio 14:15 to find out how many boys and girls would be in a class triple the size.
There are many more ways to write a ratio than part to whole. I hope I helped! :)
It has a solution, but it isn't a positive number, it's a negative one (which you probably didn't get to jet at school, so teacher said it hasn't got a solution)
8X + 19 = 11
move every normal number without X to one side (remember, when moving number across sides, change its sign)
8X = 11 - 19
now
8X = -8
and you get X that is a negative
X = -8/8
X = -1
What graphs? I don’t see them.
It is yes . This is because it’s only some business cards and not all business cards.