Arrange the decimals from 1. greatest to least
1 answer:
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By using the rules:
We have proven the identity. Below you can follow the demonstration.
<h3></h3><h3>How to prove the identity?</h3>Here you need to remember two things:
Here we have the expression:
By using the first rule, we can rewrite:
By using the second rule, we can rewrite:
Now if we multiply and divide by cos(x), we get:
In this way, the identity was proven.
If you want to learn more about trigonometric identities:
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