Two vectors a and b have magnitudes 2√2 and 9 respectively. Also, a⋅b=18. Find the angle between a and b to the nearest whole de
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By definition, the circumference of a circle is:
The area of a circle is:
Where,
r: radius of the circle.
When the radius is double, then the new area is:
Rewriting we have:
In terms of a we have:
Answer:
The new area of the circle in terms of a is:
The area of a circle is:
Where,
r: radius of the circle.
When the radius is double, then the new area is:
Rewriting we have:
In terms of a we have:
Answer:
The new area of the circle in terms of a is: