Polar form of a complex number is r( cos(theta) + i sin(theta) )
r is equal to the total distance created by the rectangular coordinates of the complex number
r = Root(4^2 + (-4)^2) = Root(32) = 4 Root(2)
To find theta, if a > 0, use arctan(b/a), where:
a = the first number
b = the second number
arctan (-4/4) = -45 degrees (-0.7854 radians)
Your answer is 4 Root(2) (cos(-45) + i sin(-45))
Answer: l=50 m, w=20 m
Step-by-step explanation:
Given
A rectangular city has an area of
Also, length is 10 m more than twice its width
suppose width is w
So, length is given by
The area is given by
Answer:
4x + 19 is an equivalent expression
Step-by-step explanation:
4x + 28 - 9
so therefore
4x + 19
15% of 80 is 12.
To check this, you can multiply 80 x 0.15, which gives you an answer of 12.
122 divided by 3.14 is 38.9.
38.9 divided by 13 is 2.9 = 3 hours