What is the exact value of cos 7pi/8
1 answer:
The exact value of cos 7pi/8 is 0. 9988
<h3>How to find the value</h3>
It is important to note that the value for pi = 3. 142
= cos 7π
Substitute value of π
= cos(7× 3. 142)
= cos 21. 994
Divide 21. 994 by 8
= 2. 740
Let's find the vale of
=
=
Thus, the exact value of cos 7pi/8 is 0. 9988
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The sum of the measures of the interior angles of the chess board is equal to 720°.
<h3>What is a polygon?</h3>A polygon can be defined as a two-dimensional geometric shape that comprises straight line segments and a finite number of sides. Also, some examples of a polygon include the following:
- Triangle
- Quadrilateral
- Pentagon
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- Heptagon
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In Geometry, the sum of the interior angles of both a regular and irregular polygon is given by this formula:
Sum of interior angles = 180 × (n - 2)
Sum of interior angles = 180 × (6 - 2)
Sum of interior angles = 180 × 4
Sum of interior angles = 720°.
Read more on sum of interior angles here: brainly.com/question/13293407
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