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Question : 77 of 160
Marks:
+1,
-0
Solution:
I=‌Apply property
‌xf(x)‌dx=‌‌∫f(x)‌dx‌‌ If ‌f(a+b−x)=f(x)‌‌‌‌‌I=‌‌‌‌dxPut
cos‌x=tsin‌x‌dx‌=−dtI‌=−‌‌‌‌=‌‌∫−11‌=‌⋅2‌‌‌=π(tan−1t)01‌=πtan−11=π×‌=‌
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