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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