Reduce to simplest form -\dfrac{1}{4}-\left(-\dfrac{3}{5}\right)=−
1 answer:
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Find the area of the circle: 
= 144pi
Since there are two colors and they are painted equally, divide that by two: 72pi
Or about 226.19 square inches
Since there are two colors and they are painted equally, divide that by two: 72pi
Or about 226.19 square inches
Remark
You are in the 4th quadrant. The only way I know how to do this is to use the double angle formula.
Formula
Sin(a + b) = sin(a) * cos(b) + sin(b)*cos(a)
Givens
a = - 45
b = - 30
Substitute
Sin(-45 - 30) = sin(-45) * cos(-30) + sin(-30)*cos(-45)
Sin(-75) = -sqrt(2)/2*sqrt(3)/2 - 1/2 * sqrt(2)/2
Sin(-75) = -sqrt(6) / 4 - sqrt(2)/4
Sin(-75) =
You are in the 4th quadrant. The only way I know how to do this is to use the double angle formula.
Formula
Sin(a + b) = sin(a) * cos(b) + sin(b)*cos(a)
Givens
a = - 45
b = - 30
Substitute
Sin(-45 - 30) = sin(-45) * cos(-30) + sin(-30)*cos(-45)
Sin(-75) = -sqrt(2)/2*sqrt(3)/2 - 1/2 * sqrt(2)/2
Sin(-75) = -sqrt(6) / 4 - sqrt(2)/4
Sin(-75) =