Calculus 7E
 |
|---|
67
| PAGE: 502 | SET: Exercises | PROBLEM: 67 |
Please look in your text book for this problem Statement
The formula is 
.
Consider 
.
Apply product-to-sum property : 
.
Since cosine is an even function, rewrite the above equation as 
.
When integrate from a negative number to its positive(in this case, it is from 
to 
), we will have 
.
This applies for all functions of cosine.
Thus, 
.
.
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