# Ex 7.11, 13 - Chapter 7 Class 12 Integrals (Term 2)

Last updated at May 29, 2018 by Teachoo

Last updated at May 29, 2018 by Teachoo

Transcript

Ex 7.11, 13 By using the properties of definite integrals, evaluate the integrals : − 𝜋2 𝜋2 sin7𝑥 𝑑𝑥 This is of form −𝑎𝑎𝑓 𝑥𝑑𝑥 𝑓 𝑥= sin7𝑥 𝑓 −𝑥= sin7 −𝑥= −𝑠𝑖𝑛𝑥7= −17 𝑠𝑖𝑛𝑥7=− sin7𝑥 Thus, 𝑓 −𝑥 =− 𝑓 𝑥 ∴ −𝜋2 𝜋2 sin7𝑥 𝑑𝑥=𝟎

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Ex 7.11, 13 You are here

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