Find the specific value by using a half-angle identity. Cosine of 5 pi split by twelve
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The provided expression is
To discover the exact value making use of identities, we can split the angle in a amount that is equivalent, the is, us rewrite the expression.
Let"s rewrite the expression
We deserve to rewrite this way, due to the fact that the sum of those fractions offers the original one. Then, us simplify
Now, right here we have to transfor from radians come degrees, due to the fact that that means we can acquire half-angles
Then, we division each portion in a method that the last expression consists of halves
The half-angle identification is
In this case,
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Can you help me through that?
x 8 0
A one is 360 degrees
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The first one, because it can not be represented as a/b.
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