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Question : 75 of 160
Marks:
+1,
-0
Solution:
When,
m=n,m∈Z Let
I=cos2mx‌dx+‌‌2sin‌mx‌cos‌m‌x‌dx cos2mx‌dx+‌‌sin‌2mx‌dx Using the formula.
f(x)={| 2‌f(x)‌dx | ‌ if ‌ | f(2a−x)=f(x) |
| 0 | ‌ if ‌ | f(2a−x)=−f(x) |
. and
f(x)={| 2‌f(x)‌dx | ‌ if ‌ | f(−x)=f(x) |
| 0 | ‌ if ‌ | f(−x)=−f(x) |
. I‌=2‌cos2mx‌dx+0 ‌=(1+cos‌2‌m‌x)‌dx ‌=[x+‌]0π=π
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