A 15° sector in a circle has an area of 11.9 m2. What is the area of the circle?
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Answer:
Step-by-step explanation:
Given
AB = 48, AC = 64, and BC = 80
Required
Determine the ratio of cosB
The first step is to determine, which type of triangle it is.
Checking for Right Angled Triangle
For a triangle to be a right angled triangle, the square of the largest side must be equal to the sum of squares of other sides
This implies that:
<em>Hence, the triangle is a right angled triangle [See attachment]</em>
From trigonometry;
The adjacent of B = 48 while the hypotenuse is 80;
Hence;
Hence, the ratio of cos B is
