Book: Mathematics Part-II
Chapter: 7. Integrals
Subject: Maths - Class 12th
Q. No. 4 of Exercise 7.9
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4
Evaluate 
Let I = 
⇒ I = 
[∫sinx dx=-cosx]
⇒ I = - (cos 2×π/4 – cos 0)/2
⇒ I = - (cos π/2 – cos 0)/2 = - (0 – 1)/2
⇒ I = �
∴ 
= �
4
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