Step-by-step explanation:
sin2x - sinx = 0
2sinxcosx - sinx = 0
(Double Angle Formula)
sinx(2cosx - 1) = 0
Either sinx = 0 or cosx = 1/2.
When sinx = 0,
x = 0 or x = π.
When cosx = 1/2,
x = π/3 or x = 5π/3.
Hence the solutions are
x = 0, x = π/3, x = π or x = 5π/3.
Answer:
a
when you round the number up it becomes 300,000.00
Answer: 81pi square meters
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Work Shown
C = 18pi is the given circumference
d = diameter which is unknown
C = pi*d
18pi = pi*d
18 = d
d = 18
The diameter is 18 meters.
Half of this is the radius r = d/2 = 18/2 = 9
The radius is 9 meters
Use the value of r to find the area of the circle
A = pi*r^2
A = pi*9^2
A = pi*81
A = 81pi
The area of the circular cross section is 81pi square meters
I hope this helps you
1)
9500.10%=950 in one year
7.950=6650 in 7 years
9500+6650=16150 total
2)
9000.11%=990 in one year
8.990=7920 in 8 years
9000+7920=16920 total
3)
13000.10,5%=1365 in 14 months
13000+1365=14365 total
4)
20000.18,5%=3700
20000+3700=23700