Answer:
3/3
Step-by-step explanation:
3/3
cos(3x) = cos(2x+x)
= cos(2x) cos (x) -sin(2x)sin(x)








The answer is quadrant 2!!!
Step-by-step explanation:
Let's call x the lenght and y the height. The perimeter will be:
p = 2x + 2y = 10
When the lenght is halved and the height double we'll have:
p = x + 4y = 14
These 2 equations form a system of equations2 that can be solved and give as result:
y = 3
x = 2
Answer:
:I
Step-by-step explanation: